206426004646 has 16 divisors (see below), whose sum is σ = 311997431376. Its totient is φ = 102427335936.

The previous prime is 206426004607. The next prime is 206426004671. The reversal of 206426004646 is 646400624602.

It is a super-2 number, since 2×206426004646² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 206426004599 and 206426004608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 764365 + ... + 998551.

It is an arithmetic number, because the mean of its divisors is an integer number (19499839461).

Almost surely, 2^206426004646 is an apocalyptic number.

206426004646 is a deficient number, since it is larger than the sum of its proper divisors (105571426730).

206426004646 is a wasteful number, since it uses less digits than its factorization.

206426004646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237543.

The product of its (nonzero) digits is 331776, while the sum is 40.

The spelling of 206426004646 in words is "two hundred six billion, four hundred twenty-six million, four thousand, six hundred forty-six".