68691632009 has 36 divisors (see below), whose sum is σ = 94392205200. Its totient is φ = 49408500960.

The previous prime is 68691631997. The next prime is 68691632011. The reversal of 68691632009 is 90023619686.

It is not a de Polignac number, because 68691632009 - 2²⁴ = 68674854793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68691632059) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 285959 + ... + 468140.

It is an arithmetic number, because the mean of its divisors is an integer number (2622005700).

Almost surely, 2^68691632009 is an apocalyptic number.

It is an amenable number.

68691632009 is a deficient number, since it is larger than the sum of its proper divisors (25700573191).

68691632009 is a wasteful number, since it uses less digits than its factorization.

68691632009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754150 (or 754130 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 50.

The spelling of 68691632009 in words is "sixty-eight billion, six hundred ninety-one million, six hundred thirty-two thousand, nine".