309213426616 has 8 divisors (see below), whose sum is σ = 579775174920. Its totient is φ = 154606713304.

The previous prime is 309213426497. The next prime is 309213426617. The reversal of 309213426616 is 616624312903.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×309213426616² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309213426617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19325839156 + ... + 19325839171.

It is an arithmetic number, because the mean of its divisors is an integer number (72471896865).

Almost surely, 2^309213426616 is an apocalyptic number.

It is an amenable number.

309213426616 is a deficient number, since it is larger than the sum of its proper divisors (270561748304).

309213426616 is a wasteful number, since it uses less digits than its factorization.

309213426616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38651678333 (or 38651678329 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 43.

The spelling of 309213426616 in words is "three hundred nine billion, two hundred thirteen million, four hundred twenty-six thousand, six hundred sixteen".