51507105648 has 80 divisors (see below), whose sum is σ = 147012662016. Its totient is φ = 15456517120.

The previous prime is 51507105613. The next prime is 51507105653. The reversal of 51507105648 is 84650170515.

51507105648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1353438 + ... + 1390973.

Almost surely, 2^51507105648 is an apocalyptic number.

It is an amenable number.

51507105648 is an abundant number, since it is smaller than the sum of its proper divisors (95505556368).

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

51507105648 is a wasteful number, since it uses less digits than its factorization.

51507105648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2744462 (or 2744456 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 42.

The spelling of 51507105648 in words is "fifty-one billion, five hundred seven million, one hundred five thousand, six hundred forty-eight".