51978530004 has 24 divisors (see below), whose sum is σ = 122818469760. Its totient is φ = 17106857664.

The previous prime is 51978529991. The next prime is 51978530041. The reversal of 51978530004 is 40003587915.

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, 27413889 + ... + 27415784.

It is an arithmetic number, because the mean of its divisors is an integer number (5117436240).

Almost surely, 2^51978530004 is an apocalyptic number.

It is an amenable number.

51978530004 is an abundant number, since it is smaller than the sum of its proper divisors (70839939756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51978530004 is a wasteful number, since it uses less digits than its factorization.

51978530004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54829759 (or 54829757 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 42.

The spelling of 51978530004 in words is "fifty-one billion, nine hundred seventy-eight million, five hundred thirty thousand, four".