4056445818 has 80 divisors (see below), whose sum is σ = 9423465480. Its totient is φ = 1302666624.

The previous prime is 4056445777. The next prime is 4056445819. The reversal of 4056445818 is 8185446504.

It is a happy number.

4056445818 is a `hidden beast` number, since 4 + 0 + 5 + 64 + 4 + 581 + 8 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1440430209 + 2616015609 = 37953^2 + 51147^2 .

It is not an unprimeable number, because it can be changed into a prime (4056445819) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3630996 + ... + 3632112.

Almost surely, 2^4056445818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4056445818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4711732740).

4056445818 is an abundant number, since it is smaller than the sum of its proper divisors (5367019662).

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

4056445818 is a wasteful number, since it uses less digits than its factorization.

4056445818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1933 (or 1924 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 45.

The square root of 4056445818 is about 63690.2333015039. The cubic root of 4056445818 is about 1594.8330479761.

The spelling of 4056445818 in words is "four billion, fifty-six million, four hundred forty-five thousand, eight hundred eighteen".