61259681197 has 24 divisors (see below), whose sum is σ = 73232795160. Its totient is φ = 50897616000.

The previous prime is 61259681191. The next prime is 61259681221. The reversal of 61259681197 is 79118695216.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 29696250276 + 31563430921 = 172326^2 + 177661^2 .

It is not a de Polignac number, because 61259681197 - 2³¹ = 59112197549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61259681191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33922 + ... + 351667.

It is an arithmetic number, because the mean of its divisors is an integer number (3051366465).

Almost surely, 2^61259681197 is an apocalyptic number.

It is an amenable number.

61259681197 is a deficient number, since it is larger than the sum of its proper divisors (11973113963).

61259681197 is a wasteful number, since it uses less digits than its factorization.

61259681197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385725 (or 385714 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 55.

The spelling of 61259681197 in words is "sixty-one billion, two hundred fifty-nine million, six hundred eighty-one thousand, one hundred ninety-seven".