13253279640 has 64 divisors (see below), whose sum is σ = 40510044000. Its totient is φ = 3467523072.

The previous prime is 13253279623. The next prime is 13253279651. The reversal of 13253279640 is 4697235231.

It is a junction number, because it is equal to n+sod(n) for n = 13253279592 and 13253279601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1035565 + ... + 1048284.

Almost surely, 2^13253279640 is an apocalyptic number.

13253279640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13253279640 is an abundant number, since it is smaller than the sum of its proper divisors (27256764360).

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

13253279640 is a wasteful number, since it uses less digits than its factorization.

13253279640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2083916 (or 2083912 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 42.

The spelling of 13253279640 in words is "thirteen billion, two hundred fifty-three million, two hundred seventy-nine thousand, six hundred forty".