2081556890 has 16 divisors (see below), whose sum is σ = 4282060032. Its totient is φ = 713676624.

The previous prime is 2081556803. The next prime is 2081556901. The reversal of 2081556890 is 986551802.

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, 14868194 + ... + 14868333.

It is an arithmetic number, because the mean of its divisors is an integer number (267628752).

Almost surely, 2^2081556890 is an apocalyptic number.

2081556890 is an abundant number, since it is smaller than the sum of its proper divisors (2200503142).

2081556890 is a wasteful number, since it uses less digits than its factorization.

2081556890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29736541.

The product of its (nonzero) digits is 172800, while the sum is 44.

The square root of 2081556890 is about 45624.0823469360. The cubic root of 2081556890 is about 1276.8192693517.

The spelling of 2081556890 in words is "two billion, eighty-one million, five hundred fifty-six thousand, eight hundred ninety".