13999039680 has 112 divisors (see below), whose sum is σ = 44479342080. Its totient is φ = 3730357248.

The previous prime is 13999039679. The next prime is 13999039699. The reversal of 13999039680 is 8693099931.

It is a super-2 number, since 2×13999039680² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13999039680.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1549737 + ... + 1558743.

Almost surely, 2^13999039680 is an apocalyptic number.

13999039680 is a gapful number since it is divisible by the number (10) 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 13999039680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22239671040).

13999039680 is an abundant number, since it is smaller than the sum of its proper divisors (30480302400).

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

13999039680 is a wasteful number, since it uses less digits than its factorization.

13999039680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10646 (or 10636 counting only the distinct ones).

The product of its (nonzero) digits is 2834352, while the sum is 57.

The spelling of 13999039680 in words is "thirteen billion, nine hundred ninety-nine million, thirty-nine thousand, six hundred eighty".