51597943815 has 32 divisors (see below), whose sum is σ = 90074592000. Its totient is φ = 25013649920.

The previous prime is 51597943801. The next prime is 51597943861. The reversal of 51597943815 is 51834979515.

It is not a de Polignac number, because 51597943815 - 2⁷ = 51597943687 is a prime.

It is a congruent number.

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, 1442416 + ... + 1477754.

It is an arithmetic number, because the mean of its divisors is an integer number (2814831000).

Almost surely, 2^51597943815 is an apocalyptic number.

51597943815 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51597943815 is a deficient number, since it is larger than the sum of its proper divisors (38476648185).

51597943815 is a wasteful number, since it uses less digits than its factorization.

51597943815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44207.

The product of its digits is 6804000, while the sum is 57.

The spelling of 51597943815 in words is "fifty-one billion, five hundred ninety-seven million, nine hundred forty-three thousand, eight hundred fifteen".