2056894609 has 81 divisors (see below), whose sum is σ = 2868142473. Its totient is φ = 1469437200.

The previous prime is 2056894589. The next prime is 2056894621. The reversal of 2056894609 is 9064986502.

The square root of 2056894609 is 45353.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 2056894609 - 2⁹ = 2056894097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (2056894009) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 66351424 + ... + 66351454.

Almost surely, 2^2056894609 is an apocalyptic number.

2056894609 is the 45353-rd square number.

2056894609 is the 22677-th centered octagonal number.

It is an amenable number.

2056894609 is a deficient number, since it is larger than the sum of its proper divisors (811247864).

2056894609 is a wasteful number, since it uses less digits than its factorization.

2056894609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 49.

The cubic root of 2056894609 is about 1271.7566385107.

Multiplying 2056894609 by its sum of digits (49), we get a square (100787835841 = 317471²).

2056894609 divided by its sum of digits (49) gives a square (41977441 = 6479²).

The spelling of 2056894609 in words is "two billion, fifty-six million, eight hundred ninety-four thousand, six hundred nine".