65904992388 has 48 divisors (see below), whose sum is σ = 170920624000. Its totient is φ = 21961152864.

The previous prime is 65904992341. The next prime is 65904992393. The reversal of 65904992388 is 88329940956.

65904992388 is a `hidden beast` number, since 6 + 590 + 4 + 9 + 9 + 2 + 38 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237633 + ... + 433911.

Almost surely, 2^65904992388 is an apocalyptic number.

It is an amenable number.

65904992388 is an abundant number, since it is smaller than the sum of its proper divisors (105015631612).

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

65904992388 is a wasteful number, since it uses less digits than its factorization.

65904992388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199401 (or 199393 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 63.

The spelling of 65904992388 in words is "sixty-five billion, nine hundred four million, nine hundred ninety-two thousand, three hundred eighty-eight".