61619189865 has 8 divisors (see below), whose sum is σ = 98590703808. Its totient is φ = 32863567920.

The previous prime is 61619189837. The next prime is 61619189869. The reversal of 61619189865 is 56898191616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61619189865 - 2⁸ = 61619189609 is a prime.

It is a super-4 number, since 4×61619189865⁴ (a number of 44 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61619189799 and 61619189808.

It is not an unprimeable number, because it can be changed into a prime (61619189869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2053972981 + ... + 2053973010.

It is an arithmetic number, because the mean of its divisors is an integer number (12323837976).

Almost surely, 2^61619189865 is an apocalyptic number.

It is an amenable number.

61619189865 is a deficient number, since it is larger than the sum of its proper divisors (36971513943).

61619189865 is a wasteful number, since it uses less digits than its factorization.

61619189865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4107945999.

The product of its digits is 5598720, while the sum is 60.

The spelling of 61619189865 in words is "sixty-one billion, six hundred nineteen million, one hundred eighty-nine thousand, eight hundred sixty-five".