13351981408 has 24 divisors (see below), whose sum is σ = 27193153680. Its totient is φ = 6445783680.

The previous prime is 13351981399. The next prime is 13351981439. The reversal of 13351981408 is 80418915331.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7193028 + ... + 7194883.

It is an arithmetic number, because the mean of its divisors is an integer number (1133048070).

Almost surely, 2^13351981408 is an apocalyptic number.

It is an amenable number.

13351981408 is an abundant number, since it is smaller than the sum of its proper divisors (13841172272).

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

13351981408 is a wasteful number, since it uses less digits than its factorization.

13351981408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14387950 (or 14387942 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 13351981408 in words is "thirteen billion, three hundred fifty-one million, nine hundred eighty-one thousand, four hundred eight".