53657868816 has 30 divisors (see below), whose sum is σ = 150167508270. Its totient is φ = 17885956224.

The previous prime is 53657868799. The next prime is 53657868829. The reversal of 53657868816 is 61886875635.

It is a happy number.

53657868816 is a `hidden beast` number, since 53 + 6 + 578 + 6 + 8 + 8 + 1 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 52890800400 + 767068416 = 229980^2 + 27696^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 186311901 + ... + 186312188.

It is an arithmetic number, because the mean of its divisors is an integer number (5005583609).

Almost surely, 2^53657868816 is an apocalyptic number.

It is an amenable number.

53657868816 is an abundant number, since it is smaller than the sum of its proper divisors (96509639454).

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

53657868816 is a wasteful number, since it uses less digits than its factorization.

53657868816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372624103 (or 372624094 counting only the distinct ones).

The product of its digits is 58060800, while the sum is 63.

The spelling of 53657868816 in words is "fifty-three billion, six hundred fifty-seven million, eight hundred sixty-eight thousand, eight hundred sixteen".