51155554504 has 16 divisors (see below), whose sum is σ = 95953694220. Its totient is φ = 25567902720.

The previous prime is 51155554469. The next prime is 51155554543. The reversal of 51155554504 is 40545555115.

51155554504 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 50073012900 + 1082541604 = 223770^2 + 32902^2 .

It is a super-2 number, since 2×51155554504² (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 3 ways as a sum of consecutive naturals, for example, 1212277 + ... + 1253764.

Almost surely, 2^51155554504 is an apocalyptic number.

It is an amenable number.

51155554504 is a deficient number, since it is larger than the sum of its proper divisors (44798139716).

51155554504 is a wasteful number, since it uses less digits than its factorization.

51155554504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2468640 (or 2468636 counting only the distinct ones).

The product of its (nonzero) digits is 250000, while the sum is 40.

The spelling of 51155554504 in words is "fifty-one billion, one hundred fifty-five million, five hundred fifty-four thousand, five hundred four".