3643659946 has 32 divisors (see below), whose sum is σ = 5866214400. Its totient is φ = 1691352576.

The previous prime is 3643659937. The next prime is 3643659947. The reversal of 3643659946 is 6499563463.

It is not an unprimeable number, because it can be changed into a prime (3643659947) 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, 756855 + ... + 761653.

It is an arithmetic number, because the mean of its divisors is an integer number (183319200).

Almost surely, 2^3643659946 is an apocalyptic number.

3643659946 is a deficient number, since it is larger than the sum of its proper divisors (2222554454).

3643659946 is a wasteful number, since it uses less digits than its factorization.

3643659946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5118.

The product of its digits is 12597120, while the sum is 55.

The square root of 3643659946 is about 60362.7364025191. The cubic root of 3643659946 is about 1538.7897313525.

The spelling of 3643659946 in words is "three billion, six hundred forty-three million, six hundred fifty-nine thousand, nine hundred forty-six".