15689734144 has 72 divisors (see below), whose sum is σ = 36493968420. Its totient is φ = 6724128768.

The previous prime is 15689734133. The next prime is 15689734171. The reversal of 15689734144 is 44143798651.

It is a junction number, because it is equal to n+sod(n) for n = 15689734091 and 15689734100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22179 + ... + 178525.

Almost surely, 2^15689734144 is an apocalyptic number.

15689734144 is a gapful number since it is divisible by the number (14) 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 15689734144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18246984210).

15689734144 is an abundant number, since it is smaller than the sum of its proper divisors (20804234276).

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

15689734144 is an equidigital number, since it uses as much as digits as its factorization.

15689734144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156383 (or 156356 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 52.

The spelling of 15689734144 in words is "fifteen billion, six hundred eighty-nine million, seven hundred thirty-four thousand, one hundred forty-four".