164569994 has 4 divisors (see below), whose sum is σ = 246854994. Its totient is φ = 82284996.

The previous prime is 164569981. The next prime is 164570011. The reversal of 164569994 is 499965461.

164569994 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 can be written as a sum of positive squares in only one way, i.e., 154678969 + 9891025 = 12437^2 + 3145^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41142497 + ... + 41142500.

Almost surely, 2^164569994 is an apocalyptic number.

164569994 is a deficient number, since it is larger than the sum of its proper divisors (82285000).

164569994 is an equidigital number, since it uses as much as digits as its factorization.

164569994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82284999.

The product of its digits is 2099520, while the sum is 53.

The square root of 164569994 is about 12828.4836983955. The cubic root of 164569994 is about 548.0037761475.

The spelling of 164569994 in words is "one hundred sixty-four million, five hundred sixty-nine thousand, nine hundred ninety-four".