426645946217 has 2 divisors, whose sum is σ = 426645946218. Its totient is φ = 426645946216.

The previous prime is 426645946201. The next prime is 426645946327. The reversal of 426645946217 is 712649546624.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 389296132096 + 37349814121 = 623936^2 + 193261^2 .

It is a cyclic number.

It is not a de Polignac number, because 426645946217 - 2⁴ = 426645946201 is a prime.

It is a super-2 number, since 2×426645946217² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (426645946417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213322973108 + 213322973109.

It is an arithmetic number, because the mean of its divisors is an integer number (213322973109).

Almost surely, 2^426645946217 is an apocalyptic number.

It is an amenable number.

426645946217 is a deficient number, since it is larger than the sum of its proper divisors (1).

426645946217 is an equidigital number, since it uses as much as digits as its factorization.

426645946217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17418240, while the sum is 56.

The spelling of 426645946217 in words is "four hundred twenty-six billion, six hundred forty-five million, nine hundred forty-six thousand, two hundred seventeen".