309349626668 has 12 divisors (see below), whose sum is σ = 541378797960. Its totient is φ = 154669970112.

The previous prime is 309349626667. The next prime is 309349626679. The reversal of 309349626668 is 866626943903.

It is a self number, because there is not a number n which added to its sum of digits gives 309349626668.

It is not an unprimeable number, because it can be changed into a prime (309349626667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1065146 + ... + 1324097.

It is an arithmetic number, because the mean of its divisors is an integer number (45114899830).

Almost surely, 2^309349626668 is an apocalyptic number.

It is an amenable number.

309349626668 is a deficient number, since it is larger than the sum of its proper divisors (232029171292).

309349626668 is a wasteful number, since it uses less digits than its factorization.

309349626668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2421616 (or 2421614 counting only the distinct ones).

The product of its (nonzero) digits is 60466176, while the sum is 62.

The spelling of 309349626668 in words is "three hundred nine billion, three hundred forty-nine million, six hundred twenty-six thousand, six hundred sixty-eight".