51601199720 has 64 divisors (see below), whose sum is σ = 134669278080. Its totient is φ = 17427776256.

The previous prime is 51601199669. The next prime is 51601199737. The reversal of 51601199720 is 2799110615.

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, 1356539 + ... + 1394058.

It is an arithmetic number, because the mean of its divisors is an integer number (2104207470).

Almost surely, 2^51601199720 is an apocalyptic number.

It is an amenable number.

51601199720 is an abundant number, since it is smaller than the sum of its proper divisors (83068078360).

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

51601199720 is a wasteful number, since it uses less digits than its factorization.

51601199720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2750682 (or 2750678 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 41.

The spelling of 51601199720 in words is "fifty-one billion, six hundred one million, one hundred ninety-nine thousand, seven hundred twenty".