61880776938 has 24 divisors (see below), whose sum is σ = 135457237188. Its totient is φ = 20414276352.

The previous prime is 61880776931. The next prime is 61880777003. The reversal of 61880776938 is 83967708816.

61880776938 is a `hidden beast` number, since 618 + 8 + 0 + 7 + 7 + 6 + 9 + 3 + 8 = 666.

61880776938 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 56526489009 + 5354287929 = 237753^2 + 73173^2 .

It is not an unprimeable number, because it can be changed into a prime (61880776931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17718981 + ... + 17722472.

Almost surely, 2^61880776938 is an apocalyptic number.

61880776938 is an abundant number, since it is smaller than the sum of its proper divisors (73576460250).

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

61880776938 is a wasteful number, since it uses less digits than its factorization.

61880776938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35441558 (or 35441555 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 63.

The spelling of 61880776938 in words is "sixty-one billion, eight hundred eighty million, seven hundred seventy-six thousand, nine hundred thirty-eight".