2061556580 has 24 divisors (see below), whose sum is σ = 4334080128. Its totient is φ = 823706208.

The previous prime is 2061556579. The next prime is 2061556591. The reversal of 2061556580 is 856551602.

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 7 ways as a sum of consecutive naturals, for example, 38684 + ... + 74963.

It is an arithmetic number, because the mean of its divisors is an integer number (180586672).

Almost surely, 2^2061556580 is an apocalyptic number.

2061556580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2061556580 is an abundant number, since it is smaller than the sum of its proper divisors (2272523548).

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

2061556580 is a wasteful number, since it uses less digits than its factorization.

2061556580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114563 (or 114561 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 38.

The square root of 2061556580 is about 45404.3674110762. The cubic root of 2061556580 is about 1272.7167296560.

The spelling of 2061556580 in words is "two billion, sixty-one million, five hundred fifty-six thousand, five hundred eighty".