309368927616 has 384 divisors, whose sum is σ = 989775360000. Its totient is φ = 85300604928.

The previous prime is 309368927561. The next prime is 309368927629. The reversal of 309368927616 is 616729863903.

It is a tau number, because it is divible by the number of its divisors (384).

It is a self number, because there is not a number n which added to its sum of digits gives 309368927616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 88414635 + ... + 88418133.

It is an arithmetic number, because the mean of its divisors is an integer number (2577540000).

Almost surely, 2^309368927616 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 309368927616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (494887680000).

309368927616 is an abundant number, since it is smaller than the sum of its proper divisors (680406432384).

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

309368927616 is a wasteful number, since it uses less digits than its factorization.

309368927616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3694 (or 3675 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 60.

The spelling of 309368927616 in words is "three hundred nine billion, three hundred sixty-eight million, nine hundred twenty-seven thousand, six hundred sixteen".