15532329990 has 128 divisors (see below), whose sum is σ = 40343536512. Its totient is φ = 3812556800.

The previous prime is 15532329983. The next prime is 15532330003. The reversal of 15532329990 is 9992323551.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10838314 + ... + 10839746.

It is an arithmetic number, because the mean of its divisors is an integer number (315183879).

Almost surely, 2^15532329990 is an apocalyptic number.

15532329990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15532329990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20171768256).

15532329990 is an abundant number, since it is smaller than the sum of its proper divisors (24811206522).

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

15532329990 is a wasteful number, since it uses less digits than its factorization.

15532329990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914.

The product of its (nonzero) digits is 656100, while the sum is 48.

The spelling of 15532329990 in words is "fifteen billion, five hundred thirty-two million, three hundred twenty-nine thousand, nine hundred ninety".