12297051891 has 24 divisors (see below), whose sum is σ = 18104860800. Its totient is φ = 8040105216.

The previous prime is 12297051887. The next prime is 12297051919. The reversal of 12297051891 is 19815079221.

12297051891 is a `hidden beast` number, since 122 + 9 + 7 + 0 + 518 + 9 + 1 = 666.

It is not a de Polignac number, because 12297051891 - 2² = 12297051887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12297051191) 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, 1928190 + ... + 1934556.

It is an arithmetic number, because the mean of its divisors is an integer number (754369200).

Almost surely, 2^12297051891 is an apocalyptic number.

12297051891 is a deficient number, since it is larger than the sum of its proper divisors (5807808909).

12297051891 is a wasteful number, since it uses less digits than its factorization.

12297051891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10475 (or 10472 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 45.

The spelling of 12297051891 in words is "twelve billion, two hundred ninety-seven million, fifty-one thousand, eight hundred ninety-one".