13888762640 has 160 divisors (see below), whose sum is σ = 33781587840. Its totient is φ = 5306499072.

The previous prime is 13888762639. The next prime is 13888762651. The reversal of 13888762640 is 4626788831.

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, 35703566 + ... + 35703954.

It is an arithmetic number, because the mean of its divisors is an integer number (211134924).

Almost surely, 2^13888762640 is an apocalyptic number.

13888762640 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 13888762640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16890793920).

13888762640 is an abundant number, since it is smaller than the sum of its proper divisors (19892825200).

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

13888762640 is a wasteful number, since it uses less digits than its factorization.

13888762640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649 (or 643 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 53.

The spelling of 13888762640 in words is "thirteen billion, eight hundred eighty-eight million, seven hundred sixty-two thousand, six hundred forty".