15987236480 has 64 divisors (see below), whose sum is σ = 38355931080. Its totient is φ = 6372065280.

The previous prime is 15987236479. The next prime is 15987236483. The reversal of 15987236480 is 8463278951.

It can be written as a sum of positive squares in 4 ways, for example, as 11425044544 + 4562191936 = 106888^2 + 67544^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (15987236483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135392 + ... + 224288.

It is a 1-persistent number, because it is pandigital, but 2⋅15987236480 = 31974472960 is not.

Almost surely, 2^15987236480 is an apocalyptic number.

15987236480 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 15987236480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19177965540).

15987236480 is an abundant number, since it is smaller than the sum of its proper divisors (22368694600).

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

15987236480 is an equidigital number, since it uses as much as digits as its factorization.

15987236480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89197 (or 89185 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 15987236480 in words is "fifteen billion, nine hundred eighty-seven million, two hundred thirty-six thousand, four hundred eighty".