425266252661 has 2 divisors, whose sum is σ = 425266252662. Its totient is φ = 425266252660.

The previous prime is 425266252639. The next prime is 425266252681. The reversal of 425266252661 is 166252662524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 371014992100 + 54251260561 = 609110^2 + 232919^2 .

It is a cyclic number.

It is not a de Polignac number, because 425266252661 - 2⁶ = 425266252597 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425266252601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212633126330 + 212633126331.

It is an arithmetic number, because the mean of its divisors is an integer number (212633126331).

Almost surely, 2^425266252661 is an apocalyptic number.

It is an amenable number.

425266252661 is a deficient number, since it is larger than the sum of its proper divisors (1).

425266252661 is an equidigital number, since it uses as much as digits as its factorization.

425266252661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2073600, while the sum is 47.

The spelling of 425266252661 in words is "four hundred twenty-five billion, two hundred sixty-six million, two hundred fifty-two thousand, six hundred sixty-one".