51870807815 has 16 divisors (see below), whose sum is σ = 64743376896. Its totient is φ = 39851479200.

The previous prime is 51870807757. The next prime is 51870807883.

51870807815 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51870807815 - 2⁸ = 51870807559 is a prime.

It is a Duffinian number.

It is a congruent 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, 1256987 + ... + 1297596.

It is an arithmetic number, because the mean of its divisors is an integer number (4046461056).

Almost surely, 2^51870807815 is an apocalyptic number.

51870807815 is a deficient number, since it is larger than the sum of its proper divisors (12872569081).

51870807815 is a wasteful number, since it uses less digits than its factorization.

51870807815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2554750.

The product of its (nonzero) digits is 627200, while the sum is 50.

The spelling of 51870807815 in words is "fifty-one billion, eight hundred seventy million, eight hundred seven thousand, eight hundred fifteen".