51657275615 has 16 divisors (see below), whose sum is σ = 70564248576. Its totient is φ = 35935495200.

The previous prime is 51657275611. The next prime is 51657275627.

51657275615 is nontrivially palindromic in base 10.

51657275615 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51657275615 - 2² = 51657275611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51657275611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20416631 + ... + 20419160.

It is an arithmetic number, because the mean of its divisors is an integer number (4410265536).

Almost surely, 2^51657275615 is an apocalyptic number.

51657275615 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51657275615 is a deficient number, since it is larger than the sum of its proper divisors (18906972961).

51657275615 is a wasteful number, since it uses less digits than its factorization.

51657275615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40835830.

The product of its digits is 2205000, while the sum is 50.

The spelling of 51657275615 in words is "fifty-one billion, six hundred fifty-seven million, two hundred seventy-five thousand, six hundred fifteen".