12981085365 has 32 divisors (see below), whose sum is σ = 21538273536. Its totient is φ = 6670702080.

The previous prime is 12981085331. The next prime is 12981085393. The reversal of 12981085365 is 56358018921.

It is a happy number.

It is not a de Polignac number, because 12981085365 - 2⁸ = 12981085109 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56376 + ... + 170705.

It is an arithmetic number, because the mean of its divisors is an integer number (673071048).

Almost surely, 2^12981085365 is an apocalyptic number.

12981085365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12981085365 is a deficient number, since it is larger than the sum of its proper divisors (8557188171).

12981085365 is a wasteful number, since it uses less digits than its factorization.

12981085365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227229.

The product of its (nonzero) digits is 518400, while the sum is 48.

The spelling of 12981085365 in words is "twelve billion, nine hundred eighty-one million, eighty-five thousand, three hundred sixty-five".