163403564 has 6 divisors (see below), whose sum is σ = 285956244. Its totient is φ = 81701780.

The previous prime is 163403561. The next prime is 163403587. The reversal of 163403564 is 465304361.

It is a self number, because there is not a number n which added to its sum of digits gives 163403564.

It is not an unprimeable number, because it can be changed into a prime (163403561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20425442 + ... + 20425449.

It is an arithmetic number, because the mean of its divisors is an integer number (47659374).

Almost surely, 2^163403564 is an apocalyptic number.

It is an amenable number.

163403564 is a deficient number, since it is larger than the sum of its proper divisors (122552680).

163403564 is a wasteful number, since it uses less digits than its factorization.

163403564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40850895 (or 40850893 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 163403564 is about 12782.9403503263. The cubic root of 163403564 is about 546.7060016973.

The spelling of 163403564 in words is "one hundred sixty-three million, four hundred three thousand, five hundred sixty-four".