51804717156 has 24 divisors (see below), whose sum is σ = 134308526240. Its totient is φ = 17268239016.

The previous prime is 51804717143. The next prime is 51804717163. The reversal of 51804717156 is 65171740815.

51804717156 is a `hidden beast` number, since 51 + 80 + 471 + 7 + 1 + 56 = 666.

It is a super-2 number, since 2×51804717156² (a number of 22 digits) contains 22 as substring.

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, 239836546 + ... + 239836761.

Almost surely, 2^51804717156 is an apocalyptic number.

It is an amenable number.

51804717156 is an abundant number, since it is smaller than the sum of its proper divisors (82503809084).

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

51804717156 is a wasteful number, since it uses less digits than its factorization.

51804717156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479673320 (or 479673312 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 45.

The spelling of 51804717156 in words is "fifty-one billion, eight hundred four million, seven hundred seventeen thousand, one hundred fifty-six".