61190207721889 has 3 divisors (see below), whose sum is σ = 61190215544307. Its totient is φ = 61190199899472.

The previous prime is 61190207721883. The next prime is 61190207721913. The reversal of 61190207721889 is 98812770209116.

The square root of 61190207721889 is 7822417.

It is a perfect power (a square), and thus also a powerful number.

61190207721889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 43938448225 + 61146269273664 = 209615^2 + 7819608^2 .

It is not a de Polignac number, because 61190207721889 - 2¹¹ = 61190207719841 is a prime.

It is a super-3 number, since 3×61190207721889³ (a number of 42 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61190207721883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3911209 + ... + 11733625.

It is an arithmetic number, because the mean of its divisors is an integer number (20396738514769).

Almost surely, 2^{61190207721889} is an apocalyptic number.

61190207721889 is the 7822417-th square number.

61190207721889 is the 3911209-th centered octagonal number.

It is an amenable number.

61190207721889 is a deficient number, since it is larger than the sum of its proper divisors (7822418).

61190207721889 is an frugal number, since it uses more digits than its factorization.

61190207721889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15644834 (or 7822417 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 61.

The spelling of 61190207721889 in words is "sixty-one trillion, one hundred ninety billion, two hundred seven million, seven hundred twenty-one thousand, eight hundred eighty-nine".