51101550011556 has 96 divisors (see below), whose sum is σ = 146313953170560. Its totient is φ = 15485318156160.

The previous prime is 51101550011527. The next prime is 51101550011563. The reversal of 51101550011556 is 65511005510115.

51101550011556 is a `hidden beast` number, since 51 + 1 + 0 + 1 + 5 + 50 + 0 + 1 + 1 + 556 = 666.

It is a super-2 number, since 2×51101550011556² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51101550011556.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 265427061 + ... + 265619516.

It is an arithmetic number, because the mean of its divisors is an integer number (1524103678860).

Almost surely, 2^{51101550011556} is an apocalyptic number.

It is an amenable number.

51101550011556 is an abundant number, since it is smaller than the sum of its proper divisors (95212403159004).

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

51101550011556 is a wasteful number, since it uses less digits than its factorization.

51101550011556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531046613 (or 531046593 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 36.

The spelling of 51101550011556 in words is "fifty-one trillion, one hundred one billion, five hundred fifty million, eleven thousand, five hundred fifty-six".