206640313465 has 32 divisors (see below), whose sum is σ = 260303155200. Its totient is φ = 157176955584.

The previous prime is 206640313459. The next prime is 206640313483. The reversal of 206640313465 is 564313046602.

It is a happy number.

206640313465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 206640313465 - 2³ = 206640313457 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27160692 + ... + 27168298.

It is an arithmetic number, because the mean of its divisors is an integer number (8134473600).

Almost surely, 2^206640313465 is an apocalyptic number.

It is an amenable number.

206640313465 is a deficient number, since it is larger than the sum of its proper divisors (53662841735).

206640313465 is a wasteful number, since it uses less digits than its factorization.

206640313465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9021.

The product of its (nonzero) digits is 311040, while the sum is 40.

The spelling of 206640313465 in words is "two hundred six billion, six hundred forty million, three hundred thirteen thousand, four hundred sixty-five".