646243534206 has 12 divisors (see below), whose sum is σ = 1400194324152. Its totient is φ = 215414511396.

The previous prime is 646243534199. The next prime is 646243534213. The reversal of 646243534206 is 602435342646.

646243534206 is a `hidden beast` number, since 6 + 4 + 6 + 2 + 435 + 3 + 4 + 206 = 666.

It is an interprime number because it is at equal distance from previous prime (646243534199) and next prime (646243534213).

It is a super-2 number, since 2×646243534206² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17951209266 + ... + 17951209301.

It is an arithmetic number, because the mean of its divisors is an integer number (116682860346).

Almost surely, 2^646243534206 is an apocalyptic number.

646243534206 is an abundant number, since it is smaller than the sum of its proper divisors (753950789946).

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

646243534206 is a wasteful number, since it uses less digits than its factorization.

646243534206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35902418575 (or 35902418572 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 45.

The spelling of 646243534206 in words is "six hundred forty-six billion, two hundred forty-three million, five hundred thirty-four thousand, two hundred six".