51164051314465 has 4 divisors (see below), whose sum is σ = 61396861577364. Its totient is φ = 40931241051568.

The previous prime is 51164051314451. The next prime is 51164051314469. The reversal of 51164051314465 is 56441315046115.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12691320750144 + 38472730564321 = 3562488^2 + 6202639^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51164051314465 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51164051314469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5116405131442 + ... + 5116405131451.

It is an arithmetic number, because the mean of its divisors is an integer number (15349215394341).

Almost surely, 2^{51164051314465} is an apocalyptic number.

It is an amenable number.

51164051314465 is a deficient number, since it is larger than the sum of its proper divisors (10232810262899).

51164051314465 is a wasteful number, since it uses less digits than its factorization.

51164051314465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10232810262898.

The product of its (nonzero) digits is 864000, while the sum is 46.

The spelling of 51164051314465 in words is "fifty-one trillion, one hundred sixty-four billion, fifty-one million, three hundred fourteen thousand, four hundred sixty-five".