206557164 has 54 divisors (see below), whose sum is σ = 573924260. Its totient is φ = 62591760.

The previous prime is 206557133. The next prime is 206557177. The reversal of 206557164 is 461755602.

It is a happy number.

206557164 is a `hidden beast` number, since 20 + 6 + 5 + 571 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 19354 + ... + 28065.

Almost surely, 2^206557164 is an apocalyptic number.

It is an amenable number.

206557164 is an abundant number, since it is smaller than the sum of its proper divisors (367367096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206557164 is a wasteful number, since it uses less digits than its factorization.

206557164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47451 (or 47435 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 206557164 is about 14372.0967155109. The cubic root of 206557164 is about 591.1260349444.

The spelling of 206557164 in words is "two hundred six million, five hundred fifty-seven thousand, one hundred sixty-four".