309609838945 has 16 divisors (see below), whose sum is σ = 416261683008. Its totient is φ = 219085093440.

The previous prime is 309609838921. The next prime is 309609838957. The reversal of 309609838945 is 549838906903.

It is not a de Polignac number, because 309609838945 - 2¹¹ = 309609836897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76069179 + ... + 76073248.

It is an arithmetic number, because the mean of its divisors is an integer number (26016355188).

Almost surely, 2^309609838945 is an apocalyptic number.

It is an amenable number.

309609838945 is a deficient number, since it is larger than the sum of its proper divisors (106651844063).

309609838945 is a wasteful number, since it uses less digits than its factorization.

309609838945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152142480.

The product of its (nonzero) digits is 50388480, while the sum is 64.

The spelling of 309609838945 in words is "three hundred nine billion, six hundred nine million, eight hundred thirty-eight thousand, nine hundred forty-five".