51352511244165 has 16 divisors (see below), whose sum is σ = 91293353323200. Its totient is φ = 27388005996816.

The previous prime is 51352511244161. The next prime is 51352511244187. The reversal of 51352511244165 is 56144211525315.

51352511244165 is a `hidden beast` number, since 5 + 1 + 3 + 52 + 511 + 24 + 4 + 1 + 65 = 666.

It is not a de Polignac number, because 51352511244165 - 2² = 51352511244161 is a prime.

It is a super-2 number, since 2×51352511244165² (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 51352511244165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51352511244161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190194485955 + ... + 190194486224.

It is an arithmetic number, because the mean of its divisors is an integer number (5705834582700).

Almost surely, 2^{51352511244165} is an apocalyptic number.

It is an amenable number.

51352511244165 is a deficient number, since it is larger than the sum of its proper divisors (39940842079035).

51352511244165 is a wasteful number, since it uses less digits than its factorization.

51352511244165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380388972193 (or 380388972187 counting only the distinct ones).

The product of its digits is 720000, while the sum is 45.

The spelling of 51352511244165 in words is "fifty-one trillion, three hundred fifty-two billion, five hundred eleven million, two hundred forty-four thousand, one hundred sixty-five".