51878164 has 24 divisors (see below), whose sum is σ = 98432768. Its totient is φ = 23781600.

The previous prime is 51878153. The next prime is 51878171. The reversal of 51878164 is 46187815.

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, 4549 + ... + 11155.

Almost surely, 2^51878164 is an apocalyptic number.

It is an amenable number.

51878164 is a deficient number, since it is larger than the sum of its proper divisors (46554604).

51878164 is a wasteful number, since it uses less digits than its factorization.

51878164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6775 (or 6773 counting only the distinct ones).

The product of its digits is 53760, while the sum is 40.

The square root of 51878164 is about 7202.6497901814. The cubic root of 51878164 is about 372.9593785949.

The spelling of 51878164 in words is "fifty-one million, eight hundred seventy-eight thousand, one hundred sixty-four".