51821167865795 has 16 divisors (see below), whose sum is σ = 62429400098688. Its totient is φ = 41294339758080.

The previous prime is 51821167865767. The next prime is 51821167865867. The reversal of 51821167865795 is 59756876112815.

It is not a de Polignac number, because 51821167865795 - 2³⁴ = 51803987996611 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1372307 + ... + 10272563.

It is an arithmetic number, because the mean of its divisors is an integer number (3901837506168).

Almost surely, 2^{51821167865795} is an apocalyptic number.

51821167865795 is a deficient number, since it is larger than the sum of its proper divisors (10608232232893).

51821167865795 is a wasteful number, since it uses less digits than its factorization.

51821167865795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8904830.

The product of its digits is 254016000, while the sum is 71.

The spelling of 51821167865795 in words is "fifty-one trillion, eight hundred twenty-one billion, one hundred sixty-seven million, eight hundred sixty-five thousand, seven hundred ninety-five".