12998512816 has 20 divisors (see below), whose sum is σ = 25191037224. Its totient is φ = 6497600000.

The previous prime is 12998512801. The next prime is 12998512829. The reversal of 12998512816 is 61821589921.

It is a happy number.

It is a super-2 number, since 2×12998512816² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37510 + ... + 165541.

Almost surely, 2^12998512816 is an apocalyptic number.

12998512816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12998512816 is a deficient number, since it is larger than the sum of its proper divisors (12192524408).

12998512816 is a wasteful number, since it uses less digits than its factorization.

12998512816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207060 (or 207054 counting only the distinct ones).

The product of its digits is 622080, while the sum is 52.

The spelling of 12998512816 in words is "twelve billion, nine hundred ninety-eight million, five hundred twelve thousand, eight hundred sixteen".