13602693640 has 32 divisors (see below), whose sum is σ = 30617734680. Its totient is φ = 5439002112.

The previous prime is 13602693623. The next prime is 13602693647. The reversal of 13602693640 is 4639620631.

It can be written as a sum of positive squares in 4 ways, for example, as 9100015236 + 4502678404 = 95394^2 + 67102^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 13602693593 and 13602693602.

It is not an unprimeable number, because it can be changed into a prime (13602693647) 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, 43564 + ... + 170596.

Almost surely, 2^13602693640 is an apocalyptic number.

13602693640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13602693640 is an abundant number, since it is smaller than the sum of its proper divisors (17015041040).

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

13602693640 is a wasteful number, since it uses less digits than its factorization.

13602693640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129721 (or 129717 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 40.

The spelling of 13602693640 in words is "thirteen billion, six hundred two million, six hundred ninety-three thousand, six hundred forty".