206172633894 has 32 divisors (see below), whose sum is σ = 418885758720. Its totient is φ = 67637522400.

The previous prime is 206172633869. The next prime is 206172633899. The reversal of 206172633894 is 498336271602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206172633899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180549 + ... + 667040.

It is an arithmetic number, because the mean of its divisors is an integer number (13090179960).

Almost surely, 2^206172633894 is an apocalyptic number.

206172633894 is an abundant number, since it is smaller than the sum of its proper divisors (212713124826).

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

206172633894 is a wasteful number, since it uses less digits than its factorization.

206172633894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848236.

The product of its (nonzero) digits is 2612736, while the sum is 51.

The spelling of 206172633894 in words is "two hundred six billion, one hundred seventy-two million, six hundred thirty-three thousand, eight hundred ninety-four".