51051111556 has 12 divisors (see below), whose sum is σ = 89762856400. Its totient is φ = 25404581160.

The previous prime is 51051111521. The next prime is 51051111653. The reversal of 51051111556 is 65511115015.

It is a super-2 number, since 2×51051111556² (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, 30242706 + ... + 30244393.

Almost surely, 2^51051111556 is an apocalyptic number.

It is an amenable number.

51051111556 is a deficient number, since it is larger than the sum of its proper divisors (38711744844).

51051111556 is a wasteful number, since it uses less digits than its factorization.

51051111556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60487314 (or 60487312 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 31.

The spelling of 51051111556 in words is "fifty-one billion, fifty-one million, one hundred eleven thousand, five hundred fifty-six".