13639657480 has 32 divisors (see below), whose sum is σ = 30845030040. Its totient is φ = 5428165120.

The previous prime is 13639657469. The next prime is 13639657487. The reversal of 13639657480 is 8475693631.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13626826756 + 12830724 = 116734^2 + 3582^2 .

It is not an unprimeable number, because it can be changed into a prime (13639657487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 857581 + ... + 873340.

Almost surely, 2^13639657480 is an apocalyptic number.

13639657480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13639657480 is an abundant number, since it is smaller than the sum of its proper divisors (17205372560).

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

13639657480 is a wasteful number, since it uses less digits than its factorization.

13639657480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731129 (or 1731125 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 52.

The spelling of 13639657480 in words is "thirteen billion, six hundred thirty-nine million, six hundred fifty-seven thousand, four hundred eighty".