206435642122 has 32 divisors (see below), whose sum is σ = 350115333120. Its totient is φ = 90770615040.

The previous prime is 206435642111. The next prime is 206435642167. The reversal of 206435642122 is 221246534602.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3346318 + ... + 3407449.

It is an arithmetic number, because the mean of its divisors is an integer number (10941104160).

Almost surely, 2^206435642122 is an apocalyptic number.

206435642122 is a deficient number, since it is larger than the sum of its proper divisors (143679690998).

206435642122 is a wasteful number, since it uses less digits than its factorization.

206435642122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6753846.

The product of its (nonzero) digits is 138240, while the sum is 37.

The spelling of 206435642122 in words is "two hundred six billion, four hundred thirty-five million, six hundred forty-two thousand, one hundred twenty-two".