61178522472 has 48 divisors (see below), whose sum is σ = 175438413540. Its totient is φ = 19193261568.

The previous prime is 61178522401. The next prime is 61178522521. The reversal of 61178522472 is 27422587116.

61178522472 is a `hidden beast` number, since 6 + 1 + 178 + 5 + 2 + 2 + 472 = 666.

61178522472 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 59695194276 + 1483328196 = 244326^2 + 38514^2 .

It is a super-2 number, since 2×61178522472² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24990003 + ... + 24992450.

Almost surely, 2^61178522472 is an apocalyptic number.

It is an amenable number.

61178522472 is an abundant number, since it is smaller than the sum of its proper divisors (114259891068).

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

61178522472 is a wasteful number, since it uses less digits than its factorization.

61178522472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49982482 (or 49982475 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The spelling of 61178522472 in words is "sixty-one billion, one hundred seventy-eight million, five hundred twenty-two thousand, four hundred seventy-two".