206555444634 has 64 divisors (see below), whose sum is σ = 527609521152. Its totient is φ = 52342204800.

The previous prime is 206555444621. The next prime is 206555444651. The reversal of 206555444634 is 436444555602.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5433372 + ... + 5471255.

It is an arithmetic number, because the mean of its divisors is an integer number (8243898768).

Almost surely, 2^206555444634 is an apocalyptic number.

206555444634 is an abundant number, since it is smaller than the sum of its proper divisors (321054076518).

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

206555444634 is a wasteful number, since it uses less digits than its factorization.

206555444634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10904691.

The product of its (nonzero) digits is 6912000, while the sum is 48.

The spelling of 206555444634 in words is "two hundred six billion, five hundred fifty-five million, four hundred forty-four thousand, six hundred thirty-four".