2781159980 has 24 divisors (see below), whose sum is σ = 5841497760. Its totient is φ = 1112261760.

The previous prime is 2781159967. The next prime is 2781160027. The reversal of 2781159980 is 899511872.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153185 + ... + 170375.

It is an arithmetic number, because the mean of its divisors is an integer number (243395740).

Almost surely, 2^2781159980 is an apocalyptic number.

2781159980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2781159980 is an abundant number, since it is smaller than the sum of its proper divisors (3060337780).

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

2781159980 is a wasteful number, since it uses less digits than its factorization.

2781159980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25289 (or 25287 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 50.

The square root of 2781159980 is about 52736.7042959645. The cubic root of 2781159980 is about 1406.2914094012.

The spelling of 2781159980 in words is "two billion, seven hundred eighty-one million, one hundred fifty-nine thousand, nine hundred eighty".