2681561580 has 48 divisors (see below), whose sum is σ = 7903553280. Its totient is φ = 677446848.

The previous prime is 2681561579. The next prime is 2681561609. The reversal of 2681561580 is 851651862.

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 15 ways as a sum of consecutive naturals, for example, 1174984 + ... + 1177263.

It is an arithmetic number, because the mean of its divisors is an integer number (164657360).

Almost surely, 2^2681561580 is an apocalyptic number.

2681561580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2681561580 is an abundant number, since it is smaller than the sum of its proper divisors (5221991700).

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

2681561580 is a wasteful number, since it uses less digits than its factorization.

2681561580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2352278 (or 2352276 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 42.

The square root of 2681561580 is about 51783.7965004498. The cubic root of 2681561580 is about 1389.2996454589.

The spelling of 2681561580 in words is "two billion, six hundred eighty-one million, five hundred sixty-one thousand, five hundred eighty".