61579896525 has 144 divisors (see below), whose sum is σ = 131157065728. Its totient is φ = 27025488000.

The previous prime is 61579896523. The next prime is 61579896533. The reversal of 61579896525 is 52569897516.

61579896525 is a `hidden beast` number, since 6 + 1 + 579 + 8 + 9 + 6 + 52 + 5 = 666.

It is not a de Polignac number, because 61579896525 - 2¹ = 61579896523 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61579896523) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 6195810 + ... + 6205740.

Almost surely, 2^61579896525 is an apocalyptic number.

It is an amenable number.

61579896525 is an abundant number, since it is smaller than the sum of its proper divisors (69577169203).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61579896525 is a wasteful number, since it uses less digits than its factorization.

61579896525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10112 (or 10104 counting only the distinct ones).

The product of its digits is 40824000, while the sum is 63.

Subtracting from 61579896525 its reverse (52569897516), we obtain a palindrome (9009999009).

The spelling of 61579896525 in words is "sixty-one billion, five hundred seventy-nine million, eight hundred ninety-six thousand, five hundred twenty-five".