13216259640 has 32 divisors (see below), whose sum is σ = 39648779280. Its totient is φ = 3524335872.

The previous prime is 13216259633. The next prime is 13216259653. The reversal of 13216259640 is 4695261231.

It is a congruent number.

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, 55067629 + ... + 55067868.

Almost surely, 2^13216259640 is an apocalyptic number.

13216259640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13216259640 is an abundant number, since it is smaller than the sum of its proper divisors (26432519640).

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

13216259640 is a wasteful number, since it uses less digits than its factorization.

13216259640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110135511 (or 110135507 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 13216259640 in words is "thirteen billion, two hundred sixteen million, two hundred fifty-nine thousand, six hundred forty".