51120207166185 has 64 divisors (see below), whose sum is σ = 90919294790400. Its totient is φ = 27252435764736.

The previous prime is 51120207166181. The next prime is 51120207166219. The reversal of 51120207166185 is 58166170202115.

51120207166185 is a `hidden beast` number, since 5 + 1 + 1 + 2 + 0 + 20 + 7 + 1 + 6 + 618 + 5 = 666.

It is not a de Polignac number, because 51120207166185 - 2² = 51120207166181 is a prime.

It is a super-2 number, since 2×51120207166185² (a number of 28 digits) contains 22 as substring.

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 51120207166185.

It is not an unprimeable number, because it can be changed into a prime (51120207166181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5276102821 + ... + 5276112509.

It is an arithmetic number, because the mean of its divisors is an integer number (1420613981100).

Almost surely, 2^{51120207166185} is an apocalyptic number.

It is an amenable number.

51120207166185 is a deficient number, since it is larger than the sum of its proper divisors (39799087624215).

51120207166185 is a wasteful number, since it uses less digits than its factorization.

51120207166185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22407 (or 22401 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 45.

The spelling of 51120207166185 in words is "fifty-one trillion, one hundred twenty billion, two hundred seven million, one hundred sixty-six thousand, one hundred eighty-five".