12951997965 has 24 divisors (see below), whose sum is σ = 22972229280. Its totient is φ = 6747086304.

The previous prime is 12951997937. The next prime is 12951997967. The reversal of 12951997965 is 56979915921.

12951997965 is a `hidden beast` number, since 1 + 29 + 519 + 9 + 7 + 96 + 5 = 666.

It is not a de Polignac number, because 12951997965 - 2⁶ = 12951997901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12951997967) 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, 3344835 + ... + 3348704.

It is an arithmetic number, because the mean of its divisors is an integer number (957176220).

Almost surely, 2^12951997965 is an apocalyptic number.

12951997965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12951997965 is a deficient number, since it is larger than the sum of its proper divisors (10020231315).

12951997965 is a wasteful number, since it uses less digits than its factorization.

12951997965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6693593 (or 6693590 counting only the distinct ones).

The product of its digits is 13778100, while the sum is 63.

The spelling of 12951997965 in words is "twelve billion, nine hundred fifty-one million, nine hundred ninety-seven thousand, nine hundred sixty-five".