2081668590 has 48 divisors (see below), whose sum is σ = 5647663008. Its totient is φ = 530975808.

The previous prime is 2081668543. The next prime is 2081668591. The reversal of 2081668590 is 958661802.

It is a super-3 number, since 3×2081668590³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081668591) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 500749 + ... + 504888.

It is an arithmetic number, because the mean of its divisors is an integer number (117659646).

Almost surely, 2^2081668590 is an apocalyptic number.

2081668590 is an abundant number, since it is smaller than the sum of its proper divisors (3565994418).

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

2081668590 is a wasteful number, since it uses less digits than its factorization.

2081668590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005673 (or 1005670 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 2081668590 is about 45625.3064647242. The cubic root of 2081668590 is about 1276.8421077316.

The spelling of 2081668590 in words is "two billion, eighty-one million, six hundred sixty-eight thousand, five hundred ninety".