206640826204 has 24 divisors (see below), whose sum is σ = 381583954080. Its totient is φ = 97717787904.

The previous prime is 206640826201. The next prime is 206640826213. The reversal of 206640826204 is 402628046602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206640826201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12610329 + ... + 12626704.

It is an arithmetic number, because the mean of its divisors is an integer number (15899331420).

Almost surely, 2^206640826204 is an apocalyptic number.

It is an amenable number.

206640826204 is a deficient number, since it is larger than the sum of its proper divisors (174943127876).

206640826204 is a wasteful number, since it uses less digits than its factorization.

206640826204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25237149 (or 25237147 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 40.

The spelling of 206640826204 in words is "two hundred six billion, six hundred forty million, eight hundred twenty-six thousand, two hundred four".