15785883980 has 12 divisors (see below), whose sum is σ = 33150356400. Its totient is φ = 6314353584.

The previous prime is 15785883947. The next prime is 15785884033. The reversal of 15785883980 is 8938858751.

It is a happy 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 3 ways as a sum of consecutive naturals, for example, 394647080 + ... + 394647119.

It is an arithmetic number, because the mean of its divisors is an integer number (2762529700).

Almost surely, 2^15785883980 is an apocalyptic number.

15785883980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15785883980 is an abundant number, since it is smaller than the sum of its proper divisors (17364472420).

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

15785883980 is a wasteful number, since it uses less digits than its factorization.

15785883980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789294208 (or 789294206 counting only the distinct ones).

The product of its (nonzero) digits is 19353600, while the sum is 62.

The spelling of 15785883980 in words is "fifteen billion, seven hundred eighty-five million, eight hundred eighty-three thousand, nine hundred eighty".