51656066055 has 96 divisors (see below), whose sum is σ = 99502827840. Its totient is φ = 24579072000.

The previous prime is 51656066029. The next prime is 51656066071. The reversal of 51656066055 is 55066065615.

It is not a de Polignac number, because 51656066055 - 2⁹ = 51656065543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 51656066055.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 15367575 + ... + 15370935.

It is an arithmetic number, because the mean of its divisors is an integer number (1036487790).

Almost surely, 2^51656066055 is an apocalyptic number.

51656066055 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51656066055 is a deficient number, since it is larger than the sum of its proper divisors (47846761785).

51656066055 is a wasteful number, since it uses less digits than its factorization.

51656066055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3953 (or 3950 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The spelling of 51656066055 in words is "fifty-one billion, six hundred fifty-six million, sixty-six thousand, fifty-five".