309699203268 has 96 divisors (see below), whose sum is σ = 890001817600. Its totient is φ = 81622961280.

The previous prime is 309699203267. The next prime is 309699203291. The reversal of 309699203268 is 862302996903.

It is not an unprimeable number, because it can be changed into a prime (309699203263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1509933 + ... + 1702731.

Almost surely, 2^309699203268 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 309699203268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (445000908800).

309699203268 is an abundant number, since it is smaller than the sum of its proper divisors (580302614332).

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

309699203268 is a wasteful number, since it uses less digits than its factorization.

309699203268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194297 (or 194295 counting only the distinct ones).

The product of its (nonzero) digits is 7558272, while the sum is 57.

The spelling of 309699203268 in words is "three hundred nine billion, six hundred ninety-nine million, two hundred three thousand, two hundred sixty-eight".