12309557616 has 60 divisors (see below), whose sum is σ = 35637596280. Its totient is φ = 3961695360.

The previous prime is 12309557567. The next prime is 12309557629. The reversal of 12309557616 is 61675590321.

12309557616 is a `hidden beast` number, since 1 + 2 + 30 + 9 + 557 + 61 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1469670 + ... + 1478021.

It is an arithmetic number, because the mean of its divisors is an integer number (593959938).

Almost surely, 2^12309557616 is an apocalyptic number.

12309557616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12309557616 is an abundant number, since it is smaller than the sum of its proper divisors (23328038664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12309557616 is a wasteful number, since it uses less digits than its factorization.

12309557616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2947734 (or 2947725 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The spelling of 12309557616 in words is "twelve billion, three hundred nine million, five hundred fifty-seven thousand, six hundred sixteen".