206104640042 has 16 divisors (see below), whose sum is σ = 354906650112. Its totient is φ = 87934457520.

The previous prime is 206104640011. The next prime is 206104640083. The reversal of 206104640042 is 240046401602.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 206104639987 and 206104640014.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33005309 + ... + 33011552.

It is an arithmetic number, because the mean of its divisors is an integer number (22181665632).

Almost surely, 2^206104640042 is an apocalyptic number.

206104640042 is a deficient number, since it is larger than the sum of its proper divisors (148802010070).

206104640042 is a wasteful number, since it uses less digits than its factorization.

206104640042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66017093.

The product of its (nonzero) digits is 9216, while the sum is 29.

The spelling of 206104640042 in words is "two hundred six billion, one hundred four million, six hundred forty thousand, forty-two".