51663902875 has 32 divisors (see below), whose sum is σ = 69500890368. Its totient is φ = 38116310400.

The previous prime is 51663902869. The next prime is 51663902893. The reversal of 51663902875 is 57820936615.

It is not a de Polignac number, because 51663902875 - 2²⁵ = 51630348443 is a prime.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1800894 + ... + 1829356.

It is an arithmetic number, because the mean of its divisors is an integer number (2171902824).

Almost surely, 2^51663902875 is an apocalyptic number.

51663902875 is a deficient number, since it is larger than the sum of its proper divisors (17836987493).

51663902875 is a wasteful number, since it uses less digits than its factorization.

51663902875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29608 (or 29598 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 51663902875 in words is "fifty-one billion, six hundred sixty-three million, nine hundred two thousand, eight hundred seventy-five".