13781983974 has 36 divisors (see below), whose sum is σ = 30304539972. Its totient is φ = 4175400240.

The previous prime is 13781983889. The next prime is 13781984009. The reversal of 13781983974 is 47938918731.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3161004 + ... + 3165360.

It is an arithmetic number, because the mean of its divisors is an integer number (841792777).

Almost surely, 2^13781983974 is an apocalyptic number.

13781983974 is an abundant number, since it is smaller than the sum of its proper divisors (16522555998).

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

13781983974 is an frugal number, since it uses more digits than its factorization.

13781983974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8741 (or 4373 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 60.

The spelling of 13781983974 in words is "thirteen billion, seven hundred eighty-one million, nine hundred eighty-three thousand, nine hundred seventy-four".