51115554504 has 48 divisors (see below), whose sum is σ = 158214813120. Its totient is φ = 14604444000.

The previous prime is 51115554473. The next prime is 51115554527. The reversal of 51115554504 is 40545551115.

51115554504 is a `hidden beast` number, since 51 + 1 + 1 + 5 + 554 + 50 + 4 = 666.

It is a super-2 number, since 2×51115554504² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (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, 50709372 + ... + 50710379.

It is an arithmetic number, because the mean of its divisors is an integer number (3296141940).

Almost surely, 2^51115554504 is an apocalyptic number.

It is an amenable number.

51115554504 is an abundant number, since it is smaller than the sum of its proper divisors (107099258616).

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

51115554504 is a wasteful number, since it uses less digits than its factorization.

51115554504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101419770 (or 101419763 counting only the distinct ones).

The product of its (nonzero) digits is 50000, while the sum is 36.

The spelling of 51115554504 in words is "fifty-one billion, one hundred fifteen million, five hundred fifty-four thousand, five hundred four".