16639718240 has 48 divisors (see below), whose sum is σ = 39320588160. Its totient is φ = 6654320640.

The previous prime is 16639718233. The next prime is 16639718261. The reversal of 16639718240 is 4281793661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 865856 + ... + 884864.

It is an arithmetic number, because the mean of its divisors is an integer number (819178920).

Almost surely, 2^16639718240 is an apocalyptic number.

16639718240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16639718240 is an abundant number, since it is smaller than the sum of its proper divisors (22680869920).

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

16639718240 is a wasteful number, since it uses less digits than its factorization.

16639718240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24495 (or 24487 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 16639718240 in words is "sixteen billion, six hundred thirty-nine million, seven hundred eighteen thousand, two hundred forty".