426521206645439 has 2 divisors, whose sum is σ = 426521206645440. Its totient is φ = 426521206645438.

The previous prime is 426521206645283. The next prime is 426521206645447. The reversal of 426521206645439 is 934546602125624.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426521206645439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426521206645489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213260603322719 + 213260603322720.

It is an arithmetic number, because the mean of its divisors is an integer number (213260603322720).

Almost surely, 2^{426521206645439} is an apocalyptic number.

426521206645439 is a deficient number, since it is larger than the sum of its proper divisors (1).

426521206645439 is an equidigital number, since it uses as much as digits as its factorization.

426521206645439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 74649600, while the sum is 59.

The spelling of 426521206645439 in words is "four hundred twenty-six trillion, five hundred twenty-one billion, two hundred six million, six hundred forty-five thousand, four hundred thirty-nine".