51505616004 has 96 divisors (see below), whose sum is σ = 125812356096. Its totient is φ = 16380887040.

The previous prime is 51505615991. The next prime is 51505616027. The reversal of 51505616004 is 40061650515.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9992692 + ... + 9997844.

It is an arithmetic number, because the mean of its divisors is an integer number (1310545376).

Almost surely, 2^51505616004 is an apocalyptic number.

It is an amenable number.

51505616004 is an abundant number, since it is smaller than the sum of its proper divisors (74306740092).

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

51505616004 is a wasteful number, since it uses less digits than its factorization.

51505616004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5565 (or 5563 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

The spelling of 51505616004 in words is "fifty-one billion, five hundred five million, six hundred sixteen thousand, four".