15873478656 has 312 divisors, whose sum is σ = 50513438304. Its totient is φ = 4417781760.

The previous prime is 15873478651. The next prime is 15873478717. The reversal of 15873478656 is 65687437851.

It is a self number, because there is not a number n which added to its sum of digits gives 15873478656.

It is not an unprimeable number, because it can be changed into a prime (15873478651) 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, 24686271 + ... + 24686913.

Almost surely, 2^15873478656 is an apocalyptic number.

15873478656 is a gapful number since it is divisible by the number (16) 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 15873478656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25256719152).

15873478656 is an abundant number, since it is smaller than the sum of its proper divisors (34639959648).

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

15873478656 is an equidigital number, since it uses as much as digits as its factorization.

15873478656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725 (or 696 counting only the distinct ones).

The product of its digits is 33868800, while the sum is 60.

The spelling of 15873478656 in words is "fifteen billion, eight hundred seventy-three million, four hundred seventy-eight thousand, six hundred fifty-six".