15444480912 has 120 divisors (see below), whose sum is σ = 46633702752. Its totient is φ = 4391654400.

The previous prime is 15444480907. The next prime is 15444480913. The reversal of 15444480912 is 21908444451.

It is a super-2 number, since 2×15444480912² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (15444480913) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 480712 + ... + 511832.

Almost surely, 2^15444480912 is an apocalyptic number.

15444480912 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 15444480912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23316851376).

15444480912 is an abundant number, since it is smaller than the sum of its proper divisors (31189221840).

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

15444480912 is a wasteful number, since it uses less digits than its factorization.

15444480912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31357 (or 31344 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 42.

The spelling of 15444480912 in words is "fifteen billion, four hundred forty-four million, four hundred eighty thousand, nine hundred twelve".