3638413491855 has 16 divisors (see below), whose sum is σ = 5821740587520. Its totient is φ = 1940394195488.

The previous prime is 3638413491821. The next prime is 3638413491857. The reversal of 3638413491855 is 5581943148363.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3638413491855 - 2¹¹ = 3638413489807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3638413491857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5488515 + ... + 6115604.

It is an arithmetic number, because the mean of its divisors is an integer number (363858786720).

Almost surely, 2^{3638413491855} is an apocalyptic number.

3638413491855 is a deficient number, since it is larger than the sum of its proper divisors (2183327095665).

3638413491855 is a wasteful number, since it uses less digits than its factorization.

3638413491855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11625030.

The product of its digits is 37324800, while the sum is 60.

The spelling of 3638413491855 in words is "three trillion, six hundred thirty-eight billion, four hundred thirteen million, four hundred ninety-one thousand, eight hundred fifty-five".