206164045 has 16 divisors (see below), whose sum is σ = 259446960. Its totient is φ = 157054464.

The previous prime is 206164033. The next prime is 206164051. The reversal of 206164045 is 540461602.

It can be written as a sum of positive squares in 8 ways, for example, as 1473796 + 204690249 = 1214^2 + 14307^2 .

It is a cyclic number.

It is not a de Polignac number, because 206164045 - 2²⁷ = 71946317 is a prime.

It is a super-2 number, since 2×206164045² = 85007226901524050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 847 + ... + 20323.

It is an arithmetic number, because the mean of its divisors is an integer number (16215435).

Almost surely, 2^206164045 is an apocalyptic number.

It is an amenable number.

206164045 is a deficient number, since it is larger than the sum of its proper divisors (53282915).

206164045 is a wasteful number, since it uses less digits than its factorization.

206164045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19584.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 206164045 is about 14358.4137355071. The cubic root of 206164045 is about 590.7507869972.

The spelling of 206164045 in words is "two hundred six million, one hundred sixty-four thousand, forty-five".