3645864136 has 32 divisors (see below), whose sum is σ = 7137855360. Its totient is φ = 1742539392.

The previous prime is 3645864133. The next prime is 3645864143. The reversal of 3645864136 is 6314685463.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (3645864133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322516 + ... + 333628.

It is an arithmetic number, because the mean of its divisors is an integer number (223057980).

Almost surely, 2^3645864136 is an apocalyptic number.

It is an amenable number.

3645864136 is a deficient number, since it is larger than the sum of its proper divisors (3491991224).

3645864136 is a wasteful number, since it uses less digits than its factorization.

3645864136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12925 (or 12921 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 46.

The square root of 3645864136 is about 60380.9915122301. The cubic root of 3645864136 is about 1539.0999598295.

The spelling of 3645864136 in words is "three billion, six hundred forty-five million, eight hundred sixty-four thousand, one hundred thirty-six".