206641264 has 20 divisors (see below), whose sum is σ = 421440040. Its totient is φ = 97882560.

The previous prime is 206641261. The next prime is 206641313. The reversal of 206641264 is 462146602.

It is a super-2 number, since 2×206641264² = 85401223975035392, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206641261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339567 + ... + 340174.

It is an arithmetic number, because the mean of its divisors is an integer number (21072002).

Almost surely, 2^206641264 is an apocalyptic number.

It is an amenable number.

206641264 is an abundant number, since it is smaller than the sum of its proper divisors (214798776).

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

206641264 is a wasteful number, since it uses less digits than its factorization.

206641264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679768 (or 679762 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 206641264 is about 14375.0222260698. The cubic root of 206641264 is about 591.2062499530.

Adding to 206641264 its reverse (462146602), we get a palindrome (668787866).

The spelling of 206641264 in words is "two hundred six million, six hundred forty-one thousand, two hundred sixty-four".