646534226 has 16 divisors (see below), whose sum is σ = 1072630104. Its totient is φ = 290335104.

The previous prime is 646534201. The next prime is 646534241. The reversal of 646534226 is 622435646.

It can be written as a sum of positive squares in 4 ways, for example, as 619960201 + 26574025 = 24899^2 + 5155^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 646534226.

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, 335075 + ... + 336998.

Almost surely, 2^646534226 is an apocalyptic number.

646534226 is a deficient number, since it is larger than the sum of its proper divisors (426095878).

646534226 is a wasteful number, since it uses less digits than its factorization.

646534226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672125.

The product of its digits is 207360, while the sum is 38.

The square root of 646534226 is about 25427.0373028397. The cubic root of 646534226 is about 864.6967767861.

The spelling of 646534226 in words is "six hundred forty-six million, five hundred thirty-four thousand, two hundred twenty-six".