4256443561636 has 24 divisors (see below), whose sum is σ = 8529226667136. Its totient is φ = 1820688767040.

The previous prime is 4256443561613. The next prime is 4256443561757. The reversal of 4256443561636 is 6361653446524.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145873936 + ... + 145903111.

It is an arithmetic number, because the mean of its divisors is an integer number (355384444464).

Almost surely, 2^{4256443561636} is an apocalyptic number.

It is an amenable number.

4256443561636 is an abundant number, since it is smaller than the sum of its proper divisors (4272783105500).

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

4256443561636 is a wasteful number, since it uses less digits than its factorization.

4256443561636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291777579 (or 291777577 counting only the distinct ones).

The product of its digits is 37324800, while the sum is 55.

The spelling of 4256443561636 in words is "four trillion, two hundred fifty-six billion, four hundred forty-three million, five hundred sixty-one thousand, six hundred thirty-six".