68657689929 has 8 divisors (see below), whose sum is σ = 91667464480. Its totient is φ = 45709854336.

The previous prime is 68657689853. The next prime is 68657689987. The reversal of 68657689929 is 92998675686.

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

It is not a de Polignac number, because 68657689929 - 2⁹ = 68657689417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68657289929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15482152 + ... + 15486585.

It is an arithmetic number, because the mean of its divisors is an integer number (11458433060).

Almost surely, 2^68657689929 is an apocalyptic number.

It is an amenable number.

68657689929 is a deficient number, since it is larger than the sum of its proper divisors (23009774551).

68657689929 is a wasteful number, since it uses less digits than its factorization.

68657689929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30969479.

The product of its digits is 705438720, while the sum is 75.

The spelling of 68657689929 in words is "sixty-eight billion, six hundred fifty-seven million, six hundred eighty-nine thousand, nine hundred twenty-nine".