426507462581 has 2 divisors, whose sum is σ = 426507462582. Its totient is φ = 426507462580.

The previous prime is 426507462571. The next prime is 426507462649. The reversal of 426507462581 is 185264705624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 328969926481 + 97537536100 = 573559^2 + 312310^2 .

It is a cyclic number.

It is not a de Polignac number, because 426507462581 - 2³⁴ = 409327593397 is a prime.

It is a super-2 number, since 2×426507462581² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426507462551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213253731290 + 213253731291.

It is an arithmetic number, because the mean of its divisors is an integer number (213253731291).

Almost surely, 2^426507462581 is an apocalyptic number.

It is an amenable number.

426507462581 is a deficient number, since it is larger than the sum of its proper divisors (1).

426507462581 is an equidigital number, since it uses as much as digits as its factorization.

426507462581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3225600, while the sum is 50.

The spelling of 426507462581 in words is "four hundred twenty-six billion, five hundred seven million, four hundred sixty-two thousand, five hundred eighty-one".