15979423356 has 144 divisors (see below), whose sum is σ = 44381675520. Its totient is φ = 4817600640.

The previous prime is 15979423349. The next prime is 15979423379. The reversal of 15979423356 is 65332497951.

15979423356 is a `hidden beast` number, since 1 + 597 + 9 + 42 + 3 + 3 + 5 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10574641 + ... + 10576151.

It is an arithmetic number, because the mean of its divisors is an integer number (308206080).

Almost surely, 2^15979423356 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 15979423356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22190837760).

15979423356 is an abundant number, since it is smaller than the sum of its proper divisors (28402252164).

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

15979423356 is a wasteful number, since it uses less digits than its factorization.

15979423356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1976 (or 1971 counting only the distinct ones).

The product of its digits is 6123600, while the sum is 54.

The spelling of 15979423356 in words is "fifteen billion, nine hundred seventy-nine million, four hundred twenty-three thousand, three hundred fifty-six".