51638697942472 has 32 divisors (see below), whose sum is σ = 98456723481600. Its totient is φ = 25387188091200.

The previous prime is 51638697942389. The next prime is 51638697942523. The reversal of 51638697942472 is 27424979683615.

It is a junction number, because it is equal to n+sod(n) for n = 51638697942395 and 51638697942404.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225911304 + ... + 226139767.

It is an arithmetic number, because the mean of its divisors is an integer number (3076772608800).

Almost surely, 2^{51638697942472} is an apocalyptic number.

It is an amenable number.

51638697942472 is a deficient number, since it is larger than the sum of its proper divisors (46818025539128).

51638697942472 is a wasteful number, since it uses less digits than its factorization.

51638697942472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452051317 (or 452051313 counting only the distinct ones).

The product of its digits is 1097349120, while the sum is 73.

The spelling of 51638697942472 in words is "fifty-one trillion, six hundred thirty-eight billion, six hundred ninety-seven million, nine hundred forty-two thousand, four hundred seventy-two".