426868553665 has 4 divisors (see below), whose sum is σ = 512242264404. Its totient is φ = 341494842928.

The previous prime is 426868553621. The next prime is 426868553689. The reversal of 426868553665 is 566355868624.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 62424522801 + 364444030864 = 249849^2 + 603692^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426868553665 is a prime.

It is a super-3 number, since 3×426868553665³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 426868553597 and 426868553606.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42686855362 + ... + 42686855371.

It is an arithmetic number, because the mean of its divisors is an integer number (128060566101).

Almost surely, 2^426868553665 is an apocalyptic number.

It is an amenable number.

426868553665 is a deficient number, since it is larger than the sum of its proper divisors (85373710739).

426868553665 is an equidigital number, since it uses as much as digits as its factorization.

426868553665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85373710738.

The product of its digits is 248832000, while the sum is 64.

The spelling of 426868553665 in words is "four hundred twenty-six billion, eight hundred sixty-eight million, five hundred fifty-three thousand, six hundred sixty-five".