15448138932 has 12 divisors (see below), whose sum is σ = 36045657536. Its totient is φ = 5149379640.

The previous prime is 15448138931. The next prime is 15448138939. The reversal of 15448138932 is 23983184451.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15448138931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 643672444 + ... + 643672467.

Almost surely, 2^15448138932 is an apocalyptic number.

15448138932 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15448138932 is an abundant number, since it is smaller than the sum of its proper divisors (20597518604).

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

15448138932 is a wasteful number, since it uses less digits than its factorization.

15448138932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287344918 (or 1287344916 counting only the distinct ones).

The product of its digits is 829440, while the sum is 48.

The spelling of 15448138932 in words is "fifteen billion, four hundred forty-eight million, one hundred thirty-eight thousand, nine hundred thirty-two".