15781032384 has 112 divisors (see below), whose sum is σ = 45814622112. Its totient is φ = 4764045312.

The previous prime is 15781032383. The next prime is 15781032413. The reversal of 15781032384 is 48323018751.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15781032383) 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, 72642 + ... + 191934.

It is an arithmetic number, because the mean of its divisors is an integer number (409059126).

Almost surely, 2^15781032384 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 15781032384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22907311056).

15781032384 is an abundant number, since it is smaller than the sum of its proper divisors (30033589728).

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

15781032384 is a wasteful number, since it uses less digits than its factorization.

15781032384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119374 (or 119364 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 15781032384 in words is "fifteen billion, seven hundred eighty-one million, thirty-two thousand, three hundred eighty-four".