51116056551 has 12 divisors (see below), whose sum is σ = 84382061712. Its totient is φ = 29209175136.

The previous prime is 51116056499. The next prime is 51116056571. The reversal of 51116056551 is 15565061115.

It is a happy number.

51116056551 is a `hidden beast` number, since 51 + 1 + 1 + 6 + 0 + 56 + 551 = 666.

It is not a de Polignac number, because 51116056551 - 2⁶ = 51116056487 is a prime.

It is a super-2 number, since 2×51116056551² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51116056571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 405682926 + ... + 405683051.

It is an arithmetic number, because the mean of its divisors is an integer number (7031838476).

Almost surely, 2^51116056551 is an apocalyptic number.

51116056551 is a deficient number, since it is larger than the sum of its proper divisors (33266005161).

51116056551 is a wasteful number, since it uses less digits than its factorization.

51116056551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811365990 (or 811365987 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 51116056551 in words is "fifty-one billion, one hundred sixteen million, fifty-six thousand, five hundred fifty-one".