13982978656 has 24 divisors (see below), whose sum is σ = 27575924040. Its totient is φ = 6979569408.

The previous prime is 13982978623. The next prime is 13982978657. The reversal of 13982978656 is 65687928931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13982978657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353421 + ... + 390988.

It is an arithmetic number, because the mean of its divisors is an integer number (1148996835).

Almost surely, 2^13982978656 is an apocalyptic number.

13982978656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13982978656 is a deficient number, since it is larger than the sum of its proper divisors (13592945384).

13982978656 is an equidigital number, since it uses as much as digits as its factorization.

13982978656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745006 (or 744998 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 64.

The spelling of 13982978656 in words is "thirteen billion, nine hundred eighty-two million, nine hundred seventy-eight thousand, six hundred fifty-six".