51595640862 has 32 divisors (see below), whose sum is σ = 105138746880. Its totient is φ = 16876641600.

The previous prime is 51595640843. The next prime is 51595640891. The reversal of 51595640862 is 26804659515.

It is a happy number.

It is a super-2 number, since 2×51595640862² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256639 + ... + 411162.

It is an arithmetic number, because the mean of its divisors is an integer number (3285585840).

Almost surely, 2^51595640862 is an apocalyptic number.

51595640862 is an abundant number, since it is smaller than the sum of its proper divisors (53543106018).

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

51595640862 is a wasteful number, since it uses less digits than its factorization.

51595640862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668048.

The product of its (nonzero) digits is 2592000, while the sum is 51.

The spelling of 51595640862 in words is "fifty-one billion, five hundred ninety-five million, six hundred forty thousand, eight hundred sixty-two".