1980173056 has 36 divisors (see below), whose sum is σ = 4185126792. Its totient is φ = 931844096.

The previous prime is 1980173053. The next prime is 1980173119. The reversal of 1980173056 is 6503710891.

It is not an unprimeable number, because it can be changed into a prime (1980173053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223150 + ... + 231853.

It is an arithmetic number, because the mean of its divisors is an integer number (116253522).

Almost surely, 2^1980173056 is an apocalyptic number.

1980173056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1980173056 is an abundant number, since it is smaller than the sum of its proper divisors (2204953736).

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

1980173056 is an equidigital number, since it uses as much as digits as its factorization.

1980173056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455036 (or 455022 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 1980173056 is about 44499.1354522759. The cubic root of 1980173056 is about 1255.7438183612.

The spelling of 1980173056 in words is "one billion, nine hundred eighty million, one hundred seventy-three thousand, fifty-six".