15801447680 has 36 divisors (see below), whose sum is σ = 37849408212. Its totient is φ = 6320578560.

The previous prime is 15801447659. The next prime is 15801447713. The reversal of 15801447680 is 8674410851.

It can be written as a sum of positive squares in 2 ways, for example, as 6443593984 + 9357853696 = 80272^2 + 96736^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6171161 + ... + 6173720.

Almost surely, 2^15801447680 is an apocalyptic number.

15801447680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15801447680 is an abundant number, since it is smaller than the sum of its proper divisors (22047960532).

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

15801447680 is an equidigital number, since it uses as much as digits as its factorization.

15801447680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12344902 (or 12344888 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 44.

The spelling of 15801447680 in words is "fifteen billion, eight hundred one million, four hundred forty-seven thousand, six hundred eighty".