12897537399213 has 16 divisors (see below), whose sum is σ = 17754846099456. Its totient is φ = 8319399631920.

The previous prime is 12897537399179. The next prime is 12897537399223. The reversal of 12897537399213 is 31299373579821.

It is not a de Polignac number, because 12897537399213 - 2⁸ = 12897537398957 is a prime.

It is a super-2 number, since 2×12897537399213² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12897537399223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12779931 + ... + 13752152.

It is an arithmetic number, because the mean of its divisors is an integer number (1109677881216).

Almost surely, 2^{12897537399213} is an apocalyptic number.

It is an amenable number.

12897537399213 is a deficient number, since it is larger than the sum of its proper divisors (4857308700243).

12897537399213 is a wasteful number, since it uses less digits than its factorization.

12897537399213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26537344.

The product of its digits is 154314720, while the sum is 69.

The spelling of 12897537399213 in words is "twelve trillion, eight hundred ninety-seven billion, five hundred thirty-seven million, three hundred ninety-nine thousand, two hundred thirteen".