426636636617 has 2 divisors, whose sum is σ = 426636636618. Its totient is φ = 426636636616.

The previous prime is 426636636593. The next prime is 426636636653. The reversal of 426636636617 is 716636636624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 279540608656 + 147096027961 = 528716^2 + 383531^2 .

It is a cyclic number.

It is not a de Polignac number, because 426636636617 - 2²⁴ = 426619859401 is a prime.

It is a super-2 number, since 2×426636636617² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (426636636017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213318318308 + 213318318309.

It is an arithmetic number, because the mean of its divisors is an integer number (213318318309).

Almost surely, 2^426636636617 is an apocalyptic number.

It is an amenable number.

426636636617 is a deficient number, since it is larger than the sum of its proper divisors (1).

426636636617 is an equidigital number, since it uses as much as digits as its factorization.

426636636617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23514624, while the sum is 56.

The spelling of 426636636617 in words is "four hundred twenty-six billion, six hundred thirty-six million, six hundred thirty-six thousand, six hundred seventeen".