75686868656 has 40 divisors (see below), whose sum is σ = 168215438880. Its totient is φ = 32316632064.

The previous prime is 75686868623. The next prime is 75686868671. The reversal of 75686868656 is 65686868657.

It is a self number, because there is not a number n which added to its sum of digits gives 75686868656.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1225961 + ... + 1286216.

It is an arithmetic number, because the mean of its divisors is an integer number (4205385972).

Almost surely, 2^75686868656 is an apocalyptic number.

It is an amenable number.

75686868656 is an abundant number, since it is smaller than the sum of its proper divisors (92528570224).

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

75686868656 is a wasteful number, since it uses less digits than its factorization.

75686868656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2512461 (or 2512455 counting only the distinct ones).

The product of its digits is 696729600, while the sum is 71.

Subtracting from 75686868656 its reverse (65686868657), we obtain a palindrome (9999999999).

The spelling of 75686868656 in words is "seventy-five billion, six hundred eighty-six million, eight hundred sixty-eight thousand, six hundred fifty-six".