15387782872 has 64 divisors (see below), whose sum is σ = 36018282240. Its totient is φ = 5987433600.

The previous prime is 15387782863. The next prime is 15387782873. The reversal of 15387782872 is 27828778351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15387782873) 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, 468922 + ... + 500662.

It is an arithmetic number, because the mean of its divisors is an integer number (562785660).

Almost surely, 2^15387782872 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 15387782872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18009141120).

15387782872 is an abundant number, since it is smaller than the sum of its proper divisors (20630499368).

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

15387782872 is a wasteful number, since it uses less digits than its factorization.

15387782872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32552 (or 32548 counting only the distinct ones).

The product of its digits is 10536960, while the sum is 58.

The spelling of 15387782872 in words is "fifteen billion, three hundred eighty-seven million, seven hundred eighty-two thousand, eight hundred seventy-two".