206161992 has 48 divisors (see below), whose sum is σ = 591203340. Its totient is φ = 64677888.

The previous prime is 206161987. The next prime is 206162017. The reversal of 206161992 is 299161602.

206161992 is a `hidden beast` number, since 20 + 616 + 19 + 9 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 203747076 + 2414916 = 14274^2 + 1554^2 .

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 11 ways as a sum of consecutive naturals, for example, 82993 + ... + 85440.

Almost surely, 2^206161992 is an apocalyptic number.

It is an amenable number.

206161992 is an abundant number, since it is smaller than the sum of its proper divisors (385041348).

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

206161992 is a wasteful number, since it uses less digits than its factorization.

206161992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168462 (or 168455 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 206161992 is about 14358.3422441450. The cubic root of 206161992 is about 590.7488260743.

The spelling of 206161992 in words is "two hundred six million, one hundred sixty-one thousand, nine hundred ninety-two".