68731979626 has 8 divisors (see below), whose sum is σ = 104256373860. Its totient is φ = 33979855008.

The previous prime is 68731979587. The next prime is 68731979651. The reversal of 68731979626 is 62697913786.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 56978167401 + 11753812225 = 238701^2 + 108415^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193067181 + ... + 193067536.

Almost surely, 2^68731979626 is an apocalyptic number.

68731979626 is a deficient number, since it is larger than the sum of its proper divisors (35524394234).

68731979626 is a wasteful number, since it uses less digits than its factorization.

68731979626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386134808.

The product of its digits is 41150592, while the sum is 64.

The spelling of 68731979626 in words is "sixty-eight billion, seven hundred thirty-one million, nine hundred seventy-nine thousand, six hundred twenty-six".