13223520864 has 120 divisors (see below), whose sum is σ = 38998780128. Its totient is φ = 4395513600.

The previous prime is 13223520853. The next prime is 13223520889. The reversal of 13223520864 is 46802532231.

13223520864 is a `hidden beast` number, since 1 + 32 + 23 + 520 + 86 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 944314 + ... + 958214.

Almost surely, 2^13223520864 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 13223520864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19499390064).

13223520864 is an abundant number, since it is smaller than the sum of its proper divisors (25775259264).

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

13223520864 is a wasteful number, since it uses less digits than its factorization.

13223520864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14290 (or 14273 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 13223520864 in words is "thirteen billion, two hundred twenty-three million, five hundred twenty thousand, eight hundred sixty-four".