15744640912 has 160 divisors (see below), whose sum is σ = 41958814464. Its totient is φ = 5524070400.

The previous prime is 15744640883. The next prime is 15744640931. The reversal of 15744640912 is 21904644751.

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, 644668 + ... + 668644.

Almost surely, 2^15744640912 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 15744640912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20979407232).

15744640912 is an abundant number, since it is smaller than the sum of its proper divisors (26214173552).

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

15744640912 is a wasteful number, since it uses less digits than its factorization.

15744640912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24057 (or 24051 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

It can be divided in two parts, 15744 and 640912, that added together give a palindrome (656656).

The spelling of 15744640912 in words is "fifteen billion, seven hundred forty-four million, six hundred forty thousand, nine hundred twelve".