15538532752 has 80 divisors (see below), whose sum is σ = 31571630080. Its totient is φ = 7399641600.

The previous prime is 15538532731. The next prime is 15538532753. The reversal of 15538532752 is 25723583551.

It is not an unprimeable number, because it can be changed into a prime (15538532753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21198178 + ... + 21198910.

It is an arithmetic number, because the mean of its divisors is an integer number (394645376).

Almost surely, 2^15538532752 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15538532752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15785815040).

15538532752 is an abundant number, since it is smaller than the sum of its proper divisors (16033097328).

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

15538532752 is a wasteful number, since it uses less digits than its factorization.

15538532752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392 (or 1386 counting only the distinct ones).

The product of its digits is 1260000, while the sum is 46.

The spelling of 15538532752 in words is "fifteen billion, five hundred thirty-eight million, five hundred thirty-two thousand, seven hundred fifty-two".