12695998464 has 156 divisors (see below), whose sum is σ = 36800524800. Its totient is φ = 4217290752.

The previous prime is 12695998453. The next prime is 12695998487. The reversal of 12695998464 is 46489959621.

It is a super-2 number, since 2×12695998464² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17657497 + ... + 17658215.

It is an arithmetic number, because the mean of its divisors is an integer number (235900800).

Almost surely, 2^12695998464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12695998464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18400262400).

12695998464 is an abundant number, since it is smaller than the sum of its proper divisors (24104526336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12695998464 is an equidigital number, since it uses as much as digits as its factorization.

12695998464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228 (or 1203 counting only the distinct ones).

The product of its digits is 33592320, while the sum is 63.

The spelling of 12695998464 in words is "twelve billion, six hundred ninety-five million, nine hundred ninety-eight thousand, four hundred sixty-four".