51627615157 has 4 divisors (see below), whose sum is σ = 54344858080. Its totient is φ = 48910372236.

The previous prime is 51627615131. The next prime is 51627615173. The reversal of 51627615157 is 75151672615.

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: 75151672615 = 5 ⋅15030334523.

It is a cyclic number.

It is not a de Polignac number, because 51627615157 - 2²⁷ = 51493397429 is a prime.

It is a super-2 number, since 2×51627615157² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51627615257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1358621433 + ... + 1358621470.

It is an arithmetic number, because the mean of its divisors is an integer number (13586214520).

Almost surely, 2^51627615157 is an apocalyptic number.

It is an amenable number.

51627615157 is a deficient number, since it is larger than the sum of its proper divisors (2717242923).

51627615157 is a wasteful number, since it uses less digits than its factorization.

51627615157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2717242922.

The product of its digits is 441000, while the sum is 46.

The spelling of 51627615157 in words is "fifty-one billion, six hundred twenty-seven million, six hundred fifteen thousand, one hundred fifty-seven".