206656405626 has 64 divisors (see below), whose sum is σ = 456049533312. Its totient is φ = 61908000000.

The previous prime is 206656405541. The next prime is 206656405661. The reversal of 206656405626 is 626504656602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4382776 + ... + 4429676.

It is an arithmetic number, because the mean of its divisors is an integer number (7125773958).

Almost surely, 2^206656405626 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206656405626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228024766656).

206656405626 is an abundant number, since it is smaller than the sum of its proper divisors (249393127686).

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

206656405626 is a wasteful number, since it uses less digits than its factorization.

206656405626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47679.

The product of its (nonzero) digits is 3110400, while the sum is 48.

The spelling of 206656405626 in words is "two hundred six billion, six hundred fifty-six million, four hundred five thousand, six hundred twenty-six".