13979946816 has 280 divisors, whose sum is σ = 45960852960. Its totient is φ = 4165862400.

The previous prime is 13979946803. The next prime is 13979946829. The reversal of 13979946816 is 61864997931.

It is an interprime number because it is at equal distance from previous prime (13979946803) and next prime (13979946829).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3476455 + ... + 3480473.

Almost surely, 2^13979946816 is an apocalyptic number.

13979946816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13979946816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22980426480).

13979946816 is an abundant number, since it is smaller than the sum of its proper divisors (31980906144).

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

13979946816 is a wasteful number, since it uses less digits than its factorization.

13979946816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4115 (or 4096 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 63.

The spelling of 13979946816 in words is "thirteen billion, nine hundred seventy-nine million, nine hundred forty-six thousand, eight hundred sixteen".