2056578639 has 32 divisors (see below), whose sum is σ = 2942592000. Its totient is φ = 1273843584.

The previous prime is 2056578637. The next prime is 2056578647. The reversal of 2056578639 is 9368756502.

It is a happy number.

It is not a de Polignac number, because 2056578639 - 2¹ = 2056578637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2056578591 and 2056578600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2056578637) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 705517 + ... + 708425.

It is an arithmetic number, because the mean of its divisors is an integer number (91956000).

Almost surely, 2^2056578639 is an apocalyptic number.

2056578639 is a deficient number, since it is larger than the sum of its proper divisors (886013361).

2056578639 is a wasteful number, since it uses less digits than its factorization.

2056578639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3167.

The product of its (nonzero) digits is 2721600, while the sum is 51.

The square root of 2056578639 is about 45349.5164141802. The cubic root of 2056578639 is about 1271.6915148496.

The spelling of 2056578639 in words is "two billion, fifty-six million, five hundred seventy-eight thousand, six hundred thirty-nine".