51590555957 has 4 divisors (see below), whose sum is σ = 51678445056. Its totient is φ = 51502666860.

The previous prime is 51590555921. The next prime is 51590555969. The reversal of 51590555957 is 75955509515.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75955509515 = 5 ⋅15191101903.

It is a cyclic number.

It is not a de Polignac number, because 51590555957 - 2⁸ = 51590555701 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 (51590555257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43943669 + ... + 43944842.

It is an arithmetic number, because the mean of its divisors is an integer number (12919611264).

Almost surely, 2^51590555957 is an apocalyptic number.

It is an amenable number.

51590555957 is a deficient number, since it is larger than the sum of its proper divisors (87889099).

51590555957 is an equidigital number, since it uses as much as digits as its factorization.

51590555957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87889098.

The product of its (nonzero) digits is 8859375, while the sum is 56.

The spelling of 51590555957 in words is "fifty-one billion, five hundred ninety million, five hundred fifty-five thousand, nine hundred fifty-seven".