13455621864 has 96 divisors (see below), whose sum is σ = 36734443200. Its totient is φ = 4449392640.

The previous prime is 13455621857. The next prime is 13455621887. The reversal of 13455621864 is 46812655431.

13455621864 is a `hidden beast` number, since 1 + 3 + 4 + 5 + 562 + 1 + 86 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5821269 + ... + 5823579.

It is an arithmetic number, because the mean of its divisors is an integer number (382650450).

Almost surely, 2^13455621864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13455621864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18367221600).

13455621864 is an abundant number, since it is smaller than the sum of its proper divisors (23278821336).

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

13455621864 is a wasteful number, since it uses less digits than its factorization.

13455621864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2935 (or 2928 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The spelling of 13455621864 in words is "thirteen billion, four hundred fifty-five million, six hundred twenty-one thousand, eight hundred sixty-four".