2056621590 has 160 divisors (see below), whose sum is σ = 5832927936. Its totient is φ = 518918400.

The previous prime is 2056621513. The next prime is 2056621591. The reversal of 2056621590 is 951266502.

2056621590 is a `hidden beast` number, since 2 + 0 + 5 + 6 + 62 + 1 + 590 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2056621591) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1881084 + ... + 1882176.

Almost surely, 2^2056621590 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2056621590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2916463968).

2056621590 is an abundant number, since it is smaller than the sum of its proper divisors (3776306346).

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

2056621590 is a wasteful number, since it uses less digits than its factorization.

2056621590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236 (or 1227 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 2056621590 is about 45349.9899669228. The cubic root of 2056621590 is about 1271.7003677474.

The spelling of 2056621590 in words is "two billion, fifty-six million, six hundred twenty-one thousand, five hundred ninety".