12815555344 has 10 divisors (see below), whose sum is σ = 24830138510. Its totient is φ = 6407777664.

The previous prime is 12815555339. The next prime is 12815555371. The reversal of 12815555344 is 44355551821.

It can be written as a sum of positive squares in only one way, i.e., 9576579600 + 3238975744 = 97860^2 + 56912^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12815555344.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400486089 + ... + 400486120.

It is an arithmetic number, because the mean of its divisors is an integer number (2483013851).

Almost surely, 2^12815555344 is an apocalyptic number.

It is an amenable number.

12815555344 is a deficient number, since it is larger than the sum of its proper divisors (12014583166).

12815555344 is an equidigital number, since it uses as much as digits as its factorization.

12815555344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800972217 (or 800972211 counting only the distinct ones).

The product of its digits is 480000, while the sum is 43.

The spelling of 12815555344 in words is "twelve billion, eight hundred fifteen million, five hundred fifty-five thousand, three hundred forty-four".