425445415261 has 2 divisors, whose sum is σ = 425445415262. Its totient is φ = 425445415260.

The previous prime is 425445415247. The next prime is 425445415459. The reversal of 425445415261 is 162514544524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 328307226361 + 97138188900 = 572981^2 + 311670^2 .

It is a cyclic number.

It is not a de Polignac number, because 425445415261 - 2⁵ = 425445415229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425442415261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212722707630 + 212722707631.

It is an arithmetic number, because the mean of its divisors is an integer number (212722707631).

Almost surely, 2^425445415261 is an apocalyptic number.

It is an amenable number.

425445415261 is a deficient number, since it is larger than the sum of its proper divisors (1).

425445415261 is an equidigital number, since it uses as much as digits as its factorization.

425445415261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768000, while the sum is 43.

Adding to 425445415261 its reverse (162514544524), we get a palindrome (587959959785).

The spelling of 425445415261 in words is "four hundred twenty-five billion, four hundred forty-five million, four hundred fifteen thousand, two hundred sixty-one".