12097981525 has 24 divisors (see below), whose sum is σ = 17148795264. Its totient is φ = 8293713600.

The previous prime is 12097981487. The next prime is 12097981529. The reversal of 12097981525 is 52518979021.

It is not a de Polignac number, because 12097981525 - 2⁹ = 12097981013 is a prime.

It is a super-2 number, since 2×12097981525² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12097981529) 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, 1159080 + ... + 1169470.

It is an arithmetic number, because the mean of its divisors is an integer number (714533136).

Almost surely, 2^12097981525 is an apocalyptic number.

It is an amenable number.

12097981525 is a deficient number, since it is larger than the sum of its proper divisors (5050813739).

12097981525 is a wasteful number, since it uses less digits than its factorization.

12097981525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17061 (or 17056 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 49.

The spelling of 12097981525 in words is "twelve billion, ninety-seven million, nine hundred eighty-one thousand, five hundred twenty-five".