12897688961 has 8 divisors (see below), whose sum is σ = 13104488448. Its totient is φ = 12691588000.

The previous prime is 12897688957. The next prime is 12897688963. The reversal of 12897688961 is 16988679821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12897688961 - 2² = 12897688957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12897688963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137345 + ... + 211326.

It is an arithmetic number, because the mean of its divisors is an integer number (1638061056).

Almost surely, 2^12897688961 is an apocalyptic number.

It is an amenable number.

12897688961 is a deficient number, since it is larger than the sum of its proper divisors (206799487).

12897688961 is an equidigital number, since it uses as much as digits as its factorization.

12897688961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349263.

The product of its digits is 20901888, while the sum is 65.

The spelling of 12897688961 in words is "twelve billion, eight hundred ninety-seven million, six hundred eighty-eight thousand, nine hundred sixty-one".