12981958525 has 24 divisors (see below), whose sum is σ = 17197822880. Its totient is φ = 9692084160.

The previous prime is 12981958463. The next prime is 12981958529. The reversal of 12981958525 is 52585918921.

It is not a de Polignac number, because 12981958525 - 2⁷ = 12981958397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12981958529) 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, 172134 + ... + 235783.

Almost surely, 2^12981958525 is an apocalyptic number.

It is an amenable number.

12981958525 is a deficient number, since it is larger than the sum of its proper divisors (4215864355).

12981958525 is a wasteful number, since it uses less digits than its factorization.

12981958525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408013 (or 408008 counting only the distinct ones).

The product of its digits is 2592000, while the sum is 55.

The spelling of 12981958525 in words is "twelve billion, nine hundred eighty-one million, nine hundred fifty-eight thousand, five hundred twenty-five".