51702815878 has 16 divisors (see below), whose sum is σ = 88636824864. Its totient is φ = 22157493120.

The previous prime is 51702815797. The next prime is 51702815893. The reversal of 51702815878 is 87851820715.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 420708 + ... + 529528.

It is an arithmetic number, because the mean of its divisors is an integer number (5539801554).

Almost surely, 2^51702815878 is an apocalyptic number.

51702815878 is a deficient number, since it is larger than the sum of its proper divisors (36934008986).

51702815878 is a wasteful number, since it uses less digits than its factorization.

51702815878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142767.

The product of its (nonzero) digits is 1254400, while the sum is 52.

The spelling of 51702815878 in words is "fifty-one billion, seven hundred two million, eight hundred fifteen thousand, eight hundred seventy-eight".