51056666055 has 12 divisors (see below), whose sum is σ = 88498221240. Its totient is φ = 27230221872.

The previous prime is 51056666053. The next prime is 51056666093. The reversal of 51056666055 is 55066665015.

It is not a de Polignac number, because 51056666055 - 2¹ = 51056666053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1134592579 = 51056666055 / (5 + 1 + 0 + 5 + 6 + 6 + 6 + 6 + 0 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 51056666055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51056666053) 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, 567296245 + ... + 567296334.

It is an arithmetic number, because the mean of its divisors is an integer number (7374851770).

Almost surely, 2^51056666055 is an apocalyptic number.

51056666055 is a deficient number, since it is larger than the sum of its proper divisors (37441555185).

51056666055 is a wasteful number, since it uses less digits than its factorization.

51056666055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134592590 (or 1134592587 counting only the distinct ones).

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

The spelling of 51056666055 in words is "fifty-one billion, fifty-six million, six hundred sixty-six thousand, fifty-five".