163645004 has 12 divisors (see below), whose sum is σ = 286733328. Its totient is φ = 81721200.

The previous prime is 163644997. The next prime is 163645019. The reversal of 163645004 is 400546361.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21632 + ... + 28199.

It is an arithmetic number, because the mean of its divisors is an integer number (23894444).

Almost surely, 2^163645004 is an apocalyptic number.

It is an amenable number.

163645004 is a deficient number, since it is larger than the sum of its proper divisors (123088324).

163645004 is a wasteful number, since it uses less digits than its factorization.

163645004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50656 (or 50654 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 163645004 is about 12792.3807010267. The cubic root of 163645004 is about 546.9751344215.

The spelling of 163645004 in words is "one hundred sixty-three million, six hundred forty-five thousand, four".