15785728580 has 36 divisors (see below), whose sum is σ = 34986612780. Its totient is φ = 5981957568.

The previous prime is 15785728579. The next prime is 15785728619. The reversal of 15785728580 is 8582758751.

15785728580 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 6557436484 + 9228292096 = 80978^2 + 96064^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1085975 + ... + 1100414.

It is an arithmetic number, because the mean of its divisors is an integer number (971850355).

Almost surely, 2^15785728580 is an apocalyptic number.

15785728580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15785728580 is an abundant number, since it is smaller than the sum of its proper divisors (19200884200).

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

15785728580 is a wasteful number, since it uses less digits than its factorization.

15785728580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2186436 (or 2186415 counting only the distinct ones).

The product of its (nonzero) digits is 6272000, while the sum is 56.

The spelling of 15785728580 in words is "fifteen billion, seven hundred eighty-five million, seven hundred twenty-eight thousand, five hundred eighty".