309912998087716 has 27 divisors (see below), whose sum is σ = 543032847052059. Its totient is φ = 154761002781528.

The previous prime is 309912998087699. The next prime is 309912998087741. The reversal of 309912998087716 is 617780899219903.

The square root of 309912998087716 is 17604346.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×309912998087716² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 30244261305 + ... + 30244271551.

Almost surely, 2^{309912998087716} is an apocalyptic number.

309912998087716 is the 17604346-th square number.

It is an amenable number.

309912998087716 is a deficient number, since it is larger than the sum of its proper divisors (233119848964343).

309912998087716 is an frugal number, since it uses more digits than its factorization.

309912998087716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22216 (or 11108 counting only the distinct ones).

The product of its (nonzero) digits is 740710656, while the sum is 79.

The spelling of 309912998087716 in words is "three hundred nine trillion, nine hundred twelve billion, nine hundred ninety-eight million, eighty-seven thousand, seven hundred sixteen".