4256355638 has 4 divisors (see below), whose sum is σ = 6384533460. Its totient is φ = 2128177818.

The previous prime is 4256355629. The next prime is 4256355647. The reversal of 4256355638 is 8365536524.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (4256355629) and next prime (4256355647).

It is a junction number, because it is equal to n+sod(n) for n = 4256355592 and 4256355601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064088908 + ... + 1064088911.

It is an arithmetic number, because the mean of its divisors is an integer number (1596133365).

Almost surely, 2^4256355638 is an apocalyptic number.

4256355638 is a deficient number, since it is larger than the sum of its proper divisors (2128177822).

4256355638 is a wasteful number, since it uses less digits than its factorization.

4256355638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128177821.

The product of its digits is 2592000, while the sum is 47.

The square root of 4256355638 is about 65240.7513598671. The cubic root of 4256355638 is about 1620.6129416095.

The spelling of 4256355638 in words is "four billion, two hundred fifty-six million, three hundred fifty-five thousand, six hundred thirty-eight".