15321088128 has 32 divisors (see below), whose sum is σ = 40696641360. Its totient is φ = 5107029248.

The previous prime is 15321088117. The next prime is 15321088129. The reversal of 15321088128 is 82188012351.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (15321088129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19948950 + ... + 19949717.

Almost surely, 2^15321088128 is an apocalyptic number.

It is an amenable number.

15321088128 is an abundant number, since it is smaller than the sum of its proper divisors (25375553232).

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

15321088128 is an equidigital number, since it uses as much as digits as its factorization.

15321088128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39898684 (or 39898672 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 39.

The spelling of 15321088128 in words is "fifteen billion, three hundred twenty-one million, eighty-eight thousand, one hundred twenty-eight".