15801738240 has 176 divisors, whose sum is σ = 50647037760. Its totient is φ = 4204953600.

The previous prime is 15801738233. The next prime is 15801738257. The reversal of 15801738240 is 4283710851.

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, 10889515 + ... + 10890965.

It is an arithmetic number, because the mean of its divisors is an integer number (287767260).

Almost surely, 2^15801738240 is an apocalyptic number.

15801738240 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 15801738240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25323518880).

15801738240 is an abundant number, since it is smaller than the sum of its proper divisors (34845299520).

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

15801738240 is a wasteful number, since it uses less digits than its factorization.

15801738240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188 (or 2170 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 39.

The spelling of 15801738240 in words is "fifteen billion, eight hundred one million, seven hundred thirty-eight thousand, two hundred forty".