15609308944 has 80 divisors (see below), whose sum is σ = 32256506880. Its totient is φ = 7296497280.

The previous prime is 15609308933. The next prime is 15609308947. The reversal of 15609308944 is 44980390651.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (15609308947) 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, 10115437 + ... + 10116979.

It is an arithmetic number, because the mean of its divisors is an integer number (403206336).

Almost surely, 2^15609308944 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 15609308944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16128253440).

15609308944 is an abundant number, since it is smaller than the sum of its proper divisors (16647197936).

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

15609308944 is a wasteful number, since it uses less digits than its factorization.

15609308944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1988 (or 1982 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 49.

The spelling of 15609308944 in words is "fifteen billion, six hundred nine million, three hundred eight thousand, nine hundred forty-four".