3638368156 has 6 divisors (see below), whose sum is σ = 6367144280. Its totient is φ = 1819184076.

The previous prime is 3638368133. The next prime is 3638368157. The reversal of 3638368156 is 6518638363.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3638368157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 454796016 + ... + 454796023.

Almost surely, 2^3638368156 is an apocalyptic number.

It is an amenable number.

3638368156 is a deficient number, since it is larger than the sum of its proper divisors (2728776124).

3638368156 is a wasteful number, since it uses less digits than its factorization.

3638368156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909592043 (or 909592041 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 49.

The square root of 3638368156 is about 60318.8872244838. The cubic root of 3638368156 is about 1538.0444278668.

The spelling of 3638368156 in words is "three billion, six hundred thirty-eight million, three hundred sixty-eight thousand, one hundred fifty-six".