51881492268 has 36 divisors (see below), whose sum is σ = 131152939008. Its totient is φ = 17292768480.

The previous prime is 51881492251. The next prime is 51881492309. The reversal of 51881492268 is 86229418815.

51881492268 is a `hidden beast` number, since 5 + 18 + 81 + 492 + 2 + 68 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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, 740598 + ... + 807618.

Almost surely, 2^51881492268 is an apocalyptic number.

It is an amenable number.

51881492268 is an abundant number, since it is smaller than the sum of its proper divisors (79271446740).

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

51881492268 is a wasteful number, since it uses less digits than its factorization.

51881492268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88534 (or 88529 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 54.

The spelling of 51881492268 in words is "fifty-one billion, eight hundred eighty-one million, four hundred ninety-two thousand, two hundred sixty-eight".