13978711434156 has 48 divisors (see below), whose sum is σ = 37801585866240. Its totient is φ = 3937665191040.

The previous prime is 13978711434139. The next prime is 13978711434157. The reversal of 13978711434156 is 65143411787931.

It is a self number, because there is not a number n which added to its sum of digits gives 13978711434156.

It is not an unprimeable number, because it can be changed into a prime (13978711434157) 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, 1171918201 + ... + 1171930128.

It is an arithmetic number, because the mean of its divisors is an integer number (787533038880).

Almost surely, 2^{13978711434156} is an apocalyptic number.

It is an amenable number.

13978711434156 is an abundant number, since it is smaller than the sum of its proper divisors (23822874432084).

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

13978711434156 is a wasteful number, since it uses less digits than its factorization.

13978711434156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343848414 (or 2343848412 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 60.

The spelling of 13978711434156 in words is "thirteen trillion, nine hundred seventy-eight billion, seven hundred eleven million, four hundred thirty-four thousand, one hundred fifty-six".