51539146372 has 24 divisors (see below), whose sum is σ = 105023169216. Its totient is φ = 21671446368.

The previous prime is 51539146361. The next prime is 51539146387. The reversal of 51539146372 is 27364193515.

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, 17363458 + ... + 17366425.

It is an arithmetic number, because the mean of its divisors is an integer number (4375965384).

Almost surely, 2^51539146372 is an apocalyptic number.

It is an amenable number.

51539146372 is an abundant number, since it is smaller than the sum of its proper divisors (53484022844).

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

51539146372 is a wasteful number, since it uses less digits than its factorization.

51539146372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34729947 (or 34729945 counting only the distinct ones).

The product of its digits is 680400, while the sum is 46.

The spelling of 51539146372 in words is "fifty-one billion, five hundred thirty-nine million, one hundred forty-six thousand, three hundred seventy-two".