309809912608 has 48 divisors (see below), whose sum is σ = 703587052224. Its totient is φ = 131534772480.

The previous prime is 309809912603. The next prime is 309809912609. The reversal of 309809912608 is 806219908903.

It is not an unprimeable number, because it can be changed into a prime (309809912603) 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, 6439023 + ... + 6486958.

It is an arithmetic number, because the mean of its divisors is an integer number (14658063588).

Almost surely, 2^309809912608 is an apocalyptic number.

It is an amenable number.

309809912608 is an abundant number, since it is smaller than the sum of its proper divisors (393777139616).

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

309809912608 is a wasteful number, since it uses less digits than its factorization.

309809912608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12926105 (or 12926097 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 55.

The spelling of 309809912608 in words is "three hundred nine billion, eight hundred nine million, nine hundred twelve thousand, six hundred eight".