13687522720 has 24 divisors (see below), whose sum is σ = 32336772804. Its totient is φ = 5475009024.

The previous prime is 13687522687. The next prime is 13687522729. The reversal of 13687522720 is 2722578631.

13687522720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 12580762896 + 1106759824 = 112164^2 + 33268^2 .

It is not an unprimeable number, because it can be changed into a prime (13687522729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42773349 + ... + 42773668.

Almost surely, 2^13687522720 is an apocalyptic number.

13687522720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13687522720 is an abundant number, since it is smaller than the sum of its proper divisors (18649250084).

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

13687522720 is an equidigital number, since it uses as much as digits as its factorization.

13687522720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85547032 (or 85547024 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 43.

The spelling of 13687522720 in words is "thirteen billion, six hundred eighty-seven million, five hundred twenty-two thousand, seven hundred twenty".