61131525104 has 40 divisors (see below), whose sum is σ = 127582146720. Its totient is φ = 28208164608.

The previous prime is 61131525061. The next prime is 61131525107. The reversal of 61131525104 is 40152513116.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61131525107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 958994 + ... + 1020750.

It is an arithmetic number, because the mean of its divisors is an integer number (3189553668).

Almost surely, 2^61131525104 is an apocalyptic number.

It is an amenable number.

61131525104 is an abundant number, since it is smaller than the sum of its proper divisors (66450621616).

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

61131525104 is a wasteful number, since it uses less digits than its factorization.

61131525104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66537 (or 66531 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The spelling of 61131525104 in words is "sixty-one billion, one hundred thirty-one million, five hundred twenty-five thousand, one hundred four".