206694281628 has 24 divisors (see below), whose sum is σ = 535874063760. Its totient is φ = 68898093840.

The previous prime is 206694281627. The next prime is 206694281699. The reversal of 206694281628 is 826182496602.

206694281628 is a `hidden beast` number, since 2 + 0 + 6 + 6 + 9 + 4 + 2 + 8 + 1 + 628 = 666.

206694281628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206694281627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 956917863 + ... + 956918078.

It is an arithmetic number, because the mean of its divisors is an integer number (22328085990).

Almost surely, 2^206694281628 is an apocalyptic number.

It is an amenable number.

206694281628 is an abundant number, since it is smaller than the sum of its proper divisors (329179782132).

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

206694281628 is a wasteful number, since it uses less digits than its factorization.

206694281628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913835954 (or 1913835946 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

The spelling of 206694281628 in words is "two hundred six billion, six hundred ninety-four million, two hundred eighty-one thousand, six hundred twenty-eight".