206424336644 has 12 divisors (see below), whose sum is σ = 363543498444. Its totient is φ = 102554765664.

The previous prime is 206424336631. The next prime is 206424336709. The reversal of 206424336644 is 446633424602.

It can be written as a sum of positive squares in 2 ways, for example, as 144666122500 + 61758214144 = 380350^2 + 248512^2 .

It is a super-2 number, since 2×206424336644² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 206424336595 and 206424336604.

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, 164349959 + ... + 164351214.

It is an arithmetic number, because the mean of its divisors is an integer number (30295291537).

Almost surely, 2^206424336644 is an apocalyptic number.

It is an amenable number.

206424336644 is a deficient number, since it is larger than the sum of its proper divisors (157119161800).

206424336644 is a wasteful number, since it uses less digits than its factorization.

206424336644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328701334 (or 328701332 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 44.

The spelling of 206424336644 in words is "two hundred six billion, four hundred twenty-four million, three hundred thirty-six thousand, six hundred forty-four".