4256540636 has 12 divisors (see below), whose sum is σ = 7507600128. Its totient is φ = 2111512032.

The previous prime is 4256540621. The next prime is 4256540647. The reversal of 4256540636 is 6360456524.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 4256540593 and 4256540602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4189001 + ... + 4190016.

It is an arithmetic number, because the mean of its divisors is an integer number (625633344).

Almost surely, 2^4256540636 is an apocalyptic number.

It is an amenable number.

4256540636 is a deficient number, since it is larger than the sum of its proper divisors (3251059492).

4256540636 is a wasteful number, since it uses less digits than its factorization.

4256540636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8379148 (or 8379146 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 41.

The square root of 4256540636 is about 65242.1691546196. The cubic root of 4256540636 is about 1620.6364206790.

The spelling of 4256540636 in words is "four billion, two hundred fifty-six million, five hundred forty thousand, six hundred thirty-six".