309864349136 has 20 divisors (see below), whose sum is σ = 600816692964. Its totient is φ = 154814880000.

The previous prime is 309864349133. The next prime is 309864349147. The reversal of 309864349136 is 631943468903.

It can be written as a sum of positive squares in 2 ways, for example, as 294675265600 + 15189083536 = 542840^2 + 123244^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309864349133) 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, 7309115 + ... + 7351386.

Almost surely, 2^309864349136 is an apocalyptic number.

It is an amenable number.

309864349136 is a deficient number, since it is larger than the sum of its proper divisors (290952343828).

309864349136 is a wasteful number, since it uses less digits than its factorization.

309864349136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14661830 (or 14661824 counting only the distinct ones).

The product of its (nonzero) digits is 10077696, while the sum is 56.

The spelling of 309864349136 in words is "three hundred nine billion, eight hundred sixty-four million, three hundred forty-nine thousand, one hundred thirty-six".