2056478864 has 80 divisors (see below), whose sum is σ = 4470142464. Its totient is φ = 908544000.

The previous prime is 2056478803. The next prime is 2056478867. The reversal of 2056478864 is 4688746502.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2056478867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1053089 + ... + 1055039.

Almost surely, 2^2056478864 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 2056478864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2235071232).

2056478864 is an abundant number, since it is smaller than the sum of its proper divisors (2413663600).

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

2056478864 is a wasteful number, since it uses less digits than its factorization.

2056478864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136 (or 2130 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 50.

The square root of 2056478864 is about 45348.4163339802. The cubic root of 2056478864 is about 1271.6709491277.

The spelling of 2056478864 in words is "two billion, fifty-six million, four hundred seventy-eight thousand, eight hundred sixty-four".