309649163365 has 16 divisors (see below), whose sum is σ = 372943342656. Its totient is φ = 246810009600.

The previous prime is 309649163347. The next prime is 309649163389. The reversal of 309649163365 is 563361946903.

It is not a de Polignac number, because 309649163365 - 2²⁹ = 309112292453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17269605 + ... + 17287525.

It is an arithmetic number, because the mean of its divisors is an integer number (23308958916).

Almost surely, 2^309649163365 is an apocalyptic number.

It is an amenable number.

309649163365 is a deficient number, since it is larger than the sum of its proper divisors (63294179291).

309649163365 is a wasteful number, since it uses less digits than its factorization.

309649163365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30420.

The product of its (nonzero) digits is 9447840, while the sum is 55.

The spelling of 309649163365 in words is "three hundred nine billion, six hundred forty-nine million, one hundred sixty-three thousand, three hundred sixty-five".