13781947584 has 56 divisors (see below), whose sum is σ = 36582144768. Its totient is φ = 4579191040.

The previous prime is 13781947577. The next prime is 13781947589. The reversal of 13781947584 is 48574918731.

It is not an unprimeable number, because it can be changed into a prime (13781947589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55692 + ... + 175115.

Almost surely, 2^13781947584 is an apocalyptic number.

It is an amenable number.

13781947584 is an abundant number, since it is smaller than the sum of its proper divisors (22800197184).

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

13781947584 is a wasteful number, since it uses less digits than its factorization.

13781947584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231133 (or 231123 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 57.

The spelling of 13781947584 in words is "thirteen billion, seven hundred eighty-one million, nine hundred forty-seven thousand, five hundred eighty-four".