309668856392 has 32 divisors (see below), whose sum is σ = 668419758720. Its totient is φ = 131746496640.

The previous prime is 309668856331. The next prime is 309668856407. The reversal of 309668856392 is 293658866903.

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, 20174084 + ... + 20189427.

It is an arithmetic number, because the mean of its divisors is an integer number (20888117460).

Almost surely, 2^309668856392 is an apocalyptic number.

It is an amenable number.

309668856392 is an abundant number, since it is smaller than the sum of its proper divisors (358750902328).

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

309668856392 is a wasteful number, since it uses less digits than its factorization.

309668856392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40363661 (or 40363657 counting only the distinct ones).

The product of its (nonzero) digits is 100776960, while the sum is 65.

The spelling of 309668856392 in words is "three hundred nine billion, six hundred sixty-eight million, eight hundred fifty-six thousand, three hundred ninety-two".