51000010055556 has 24 divisors (see below), whose sum is σ = 119011358172000. Its totient is φ = 16998384107712.

The previous prime is 51000010055549. The next prime is 51000010055611. The reversal of 51000010055556 is 65555001000015.

It is a super-2 number, since 2×51000010055556² (a number of 28 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, 202274281 + ... + 202526256.

It is an arithmetic number, because the mean of its divisors is an integer number (4958806590500).

Almost surely, 2^{51000010055556} is an apocalyptic number.

It is an amenable number.

51000010055556 is an abundant number, since it is smaller than the sum of its proper divisors (68011348116444).

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

51000010055556 is a wasteful number, since it uses less digits than its factorization.

51000010055556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404811043 (or 404811041 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 33.

The spelling of 51000010055556 in words is "fifty-one trillion, ten million, fifty-five thousand, five hundred fifty-six".