309626889345 has 24 divisors (see below), whose sum is σ = 545484754152. Its totient is φ = 162427219200.

The previous prime is 309626889343. The next prime is 309626889347. The reversal of 309626889345 is 543988626903.

It is an interprime number because it is at equal distance from previous prime (309626889343) and next prime (309626889347).

It can be written as a sum of positive squares in 4 ways, for example, as 428614209 + 309198275136 = 20703^2 + 556056^2 .

It is not a de Polignac number, because 309626889345 - 2¹ = 309626889343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (309626889343) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56395596 + ... + 56401085.

It is an arithmetic number, because the mean of its divisors is an integer number (22728531423).

Almost surely, 2^309626889345 is an apocalyptic number.

It is an amenable number.

309626889345 is a deficient number, since it is larger than the sum of its proper divisors (235857864807).

309626889345 is a wasteful number, since it uses less digits than its factorization.

309626889345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112796753 (or 112796750 counting only the distinct ones).

The product of its (nonzero) digits is 67184640, while the sum is 63.

The spelling of 309626889345 in words is "three hundred nine billion, six hundred twenty-six million, eight hundred eighty-nine thousand, three hundred forty-five".