164894563 has 4 divisors (see below), whose sum is σ = 165057088. Its totient is φ = 164732040.

The previous prime is 164894539. The next prime is 164894573. The reversal of 164894563 is 365498461.

164894563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 164894563 - 2⁵ = 164894531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164894573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79731 + ... + 81772.

It is an arithmetic number, because the mean of its divisors is an integer number (41264272).

Almost surely, 2^164894563 is an apocalyptic number.

164894563 is a deficient number, since it is larger than the sum of its proper divisors (162525).

164894563 is a wasteful number, since it uses less digits than its factorization.

164894563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162524.

The product of its digits is 622080, while the sum is 46.

The square root of 164894563 is about 12841.1277931496. The cubic root of 164894563 is about 548.3638017538.

The spelling of 164894563 in words is "one hundred sixty-four million, eight hundred ninety-four thousand, five hundred sixty-three".