13388697522 has 30 divisors (see below), whose sum is σ = 30003900399. Its totient is φ = 4462408260.

The previous prime is 13388697481. The next prime is 13388697523. The reversal of 13388697522 is 22579688331.

13388697522 is a `hidden beast` number, since 1 + 3 + 38 + 86 + 9 + 7 + 522 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6694348761 + 6694348761 = 81819^2 + 81819^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=81819.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (13388697523) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1468197 + ... + 1477287.

Almost surely, 2^13388697522 is an apocalyptic number.

13388697522 is an abundant number, since it is smaller than the sum of its proper divisors (16615202877).

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

13388697522 is an frugal number, since it uses more digits than its factorization.

13388697522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18196 (or 9096 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The spelling of 13388697522 in words is "thirteen billion, three hundred eighty-eight million, six hundred ninety-seven thousand, five hundred twenty-two".