51636443165165 has 32 divisors (see below), whose sum is σ = 65650398621696. Its totient is φ = 38854475320320.

The previous prime is 51636443165113. The next prime is 51636443165179. The reversal of 51636443165165 is 56156134463615.

It is not a de Polignac number, because 51636443165165 - 2¹⁶ = 51636443099629 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51636443165165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1174254119 + ... + 1174298091.

It is an arithmetic number, because the mean of its divisors is an integer number (2051574956928).

Almost surely, 2^{51636443165165} is an apocalyptic number.

It is an amenable number.

51636443165165 is a deficient number, since it is larger than the sum of its proper divisors (14013955456531).

51636443165165 is a wasteful number, since it uses less digits than its factorization.

51636443165165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52469.

The product of its digits is 23328000, while the sum is 56.

The spelling of 51636443165165 in words is "fifty-one trillion, six hundred thirty-six billion, four hundred forty-three million, one hundred sixty-five thousand, one hundred sixty-five".