68504693136 has 40 divisors (see below), whose sum is σ = 193058682144. Its totient is φ = 20758997760.

The previous prime is 68504693083. The next prime is 68504693207. The reversal of 68504693136 is 63139640586.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 64871341 + ... + 64872396.

Almost surely, 2^68504693136 is an apocalyptic number.

68504693136 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

68504693136 is an abundant number, since it is smaller than the sum of its proper divisors (124553989008).

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

68504693136 is a wasteful number, since it uses less digits than its factorization.

68504693136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129743759 (or 129743753 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 51.

The spelling of 68504693136 in words is "sixty-eight billion, five hundred four million, six hundred ninety-three thousand, one hundred thirty-six".