15520445532 has 96 divisors (see below), whose sum is σ = 41353381440. Its totient is φ = 5030922240.

The previous prime is 15520445519. The next prime is 15520445557. The reversal of 15520445532 is 23554402551.

15520445532 is a `hidden beast` number, since 15 + 52 + 0 + 44 + 553 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1398148 + ... + 1409204.

It is an arithmetic number, because the mean of its divisors is an integer number (430764390).

Almost surely, 2^15520445532 is an apocalyptic number.

15520445532 is a gapful number since it is divisible by the number (12) 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 15520445532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20676690720).

15520445532 is an abundant number, since it is smaller than the sum of its proper divisors (25832935908).

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

15520445532 is a wasteful number, since it uses less digits than its factorization.

15520445532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11428 (or 11420 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 36.

The spelling of 15520445532 in words is "fifteen billion, five hundred twenty million, four hundred forty-five thousand, five hundred thirty-two".