2081426564 has 48 divisors (see below), whose sum is σ = 4284225792. Its totient is φ = 866132352.

The previous prime is 2081426563. The next prime is 2081426587. The reversal of 2081426564 is 4656241802.

It is not an unprimeable number, because it can be changed into a prime (2081426563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 575249 + ... + 578855.

It is an arithmetic number, because the mean of its divisors is an integer number (89254704).

Almost surely, 2^2081426564 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2081426564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2142112896).

2081426564 is an abundant number, since it is smaller than the sum of its proper divisors (2202799228).

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

2081426564 is a wasteful number, since it uses less digits than its factorization.

2081426564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4212 (or 4210 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 38.

The square root of 2081426564 is about 45622.6540657161. The cubic root of 2081426564 is about 1276.7926216340.

The spelling of 2081426564 in words is "two billion, eighty-one million, four hundred twenty-six thousand, five hundred sixty-four".