426513421544557 has 2 divisors, whose sum is σ = 426513421544558. Its totient is φ = 426513421544556.

The previous prime is 426513421544513. The next prime is 426513421544569. The reversal of 426513421544557 is 755445124315624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 426064958278281 + 448463266276 = 20641341^2 + 669674^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426513421544557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426513421544657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213256710772278 + 213256710772279.

It is an arithmetic number, because the mean of its divisors is an integer number (213256710772279).

Almost surely, 2^{426513421544557} is an apocalyptic number.

It is an amenable number.

426513421544557 is a deficient number, since it is larger than the sum of its proper divisors (1).

426513421544557 is an equidigital number, since it uses as much as digits as its factorization.

426513421544557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640000, while the sum is 58.

The spelling of 426513421544557 in words is "four hundred twenty-six trillion, five hundred thirteen billion, four hundred twenty-one million, five hundred forty-four thousand, five hundred fifty-seven".