426757885621 has 2 divisors, whose sum is σ = 426757885622. Its totient is φ = 426757885620.

The previous prime is 426757885537. The next prime is 426757885639. The reversal of 426757885621 is 126588757624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 315378835396 + 111379050225 = 561586^2 + 333735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426757885621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 426757885621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426757885651) 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, 213378942810 + 213378942811.

It is an arithmetic number, because the mean of its divisors is an integer number (213378942811).

Almost surely, 2^426757885621 is an apocalyptic number.

It is an amenable number.

426757885621 is a deficient number, since it is larger than the sum of its proper divisors (1).

426757885621 is an equidigital number, since it uses as much as digits as its factorization.

426757885621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45158400, while the sum is 61.

The spelling of 426757885621 in words is "four hundred twenty-six billion, seven hundred fifty-seven million, eight hundred eighty-five thousand, six hundred twenty-one".