206641964 has 12 divisors (see below), whose sum is σ = 362650344. Its totient is φ = 103027584.

The previous prime is 206641951. The next prime is 206641973. The reversal of 206641964 is 469146602.

It is a happy number.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71762 + ... + 74585.

It is an arithmetic number, because the mean of its divisors is an integer number (30220862).

Almost surely, 2^206641964 is an apocalyptic number.

It is an amenable number.

206641964 is a deficient number, since it is larger than the sum of its proper divisors (156008380).

206641964 is a wasteful number, since it uses less digits than its factorization.

206641964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146704 (or 146702 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 206641964 is about 14375.0465738376. The cubic root of 206641964 is about 591.2069175252.

The spelling of 206641964 in words is "two hundred six million, six hundred forty-one thousand, nine hundred sixty-four".