13888806520 has 16 divisors (see below), whose sum is σ = 31249814760. Its totient is φ = 5555522592.

The previous prime is 13888806499. The next prime is 13888806521. The reversal of 13888806520 is 2560888831.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13888806521) 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, 173610042 + ... + 173610121.

Almost surely, 2^13888806520 is an apocalyptic number.

13888806520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13888806520 is an abundant number, since it is smaller than the sum of its proper divisors (17361008240).

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

13888806520 is a wasteful number, since it uses less digits than its factorization.

13888806520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347220174 (or 347220170 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 49.

The spelling of 13888806520 in words is "thirteen billion, eight hundred eighty-eight million, eight hundred six thousand, five hundred twenty".