13042256640 has 288 divisors, whose sum is σ = 50111685120. Its totient is φ = 2824077312.

The previous prime is 13042256629. The next prime is 13042256671. The reversal of 13042256640 is 4665224031.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 497952 + ... + 523488.

Almost surely, 2^13042256640 is an apocalyptic number.

13042256640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13042256640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25055842560).

13042256640 is an abundant number, since it is smaller than the sum of its proper divisors (37069428480).

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

13042256640 is a wasteful number, since it uses less digits than its factorization.

13042256640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25587 (or 25573 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The spelling of 13042256640 in words is "thirteen billion, forty-two million, two hundred fifty-six thousand, six hundred forty".