13215553408 has 32 divisors (see below), whose sum is σ = 26369097120. Its totient is φ = 6597427200.

The previous prime is 13215553399. The next prime is 13215553409. The reversal of 13215553408 is 80435551231.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13215553409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1513 + ... + 162583.

It is an arithmetic number, because the mean of its divisors is an integer number (824034285).

Almost surely, 2^13215553408 is an apocalyptic number.

It is an amenable number.

13215553408 is a deficient number, since it is larger than the sum of its proper divisors (13153543712).

13215553408 is an equidigital number, since it uses as much as digits as its factorization.

13215553408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161726 (or 161714 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 13215553408 in words is "thirteen billion, two hundred fifteen million, five hundred fifty-three thousand, four hundred eight".