206649607564 has 12 divisors (see below), whose sum is σ = 365993883864. Its totient is φ = 102079926464.

The previous prime is 206649607553. The next prime is 206649607579. The reversal of 206649607564 is 465706946602.

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, 311218957 + ... + 311219620.

It is an arithmetic number, because the mean of its divisors is an integer number (30499490322).

Almost surely, 2^206649607564 is an apocalyptic number.

It is an amenable number.

206649607564 is a deficient number, since it is larger than the sum of its proper divisors (159344276300).

206649607564 is a wasteful number, since it uses less digits than its factorization.

206649607564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622438664 (or 622438662 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 55.

The spelling of 206649607564 in words is "two hundred six billion, six hundred forty-nine million, six hundred seven thousand, five hundred sixty-four".