13781979312 has 40 divisors (see below), whose sum is σ = 35609339904. Its totient is φ = 4593232704.

The previous prime is 13781979283. The next prime is 13781979361. The reversal of 13781979312 is 21397918731.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320733 + ... + 361155.

Almost surely, 2^13781979312 is an apocalyptic number.

13781979312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13781979312 is an abundant number, since it is smaller than the sum of its proper divisors (21827360592).

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

13781979312 is a wasteful number, since it uses less digits than its factorization.

13781979312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47537 (or 47531 counting only the distinct ones).

The product of its digits is 571536, while the sum is 51.

The spelling of 13781979312 in words is "thirteen billion, seven hundred eighty-one million, nine hundred seventy-nine thousand, three hundred twelve".