425772216481 has 2 divisors, whose sum is σ = 425772216482. Its totient is φ = 425772216480.

The previous prime is 425772216413. The next prime is 425772216533. The reversal of 425772216481 is 184612277524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 410393984400 + 15378232081 = 640620^2 + 124009^2 .

It is a cyclic number.

It is not a de Polignac number, because 425772216481 - 2⁹ = 425772215969 is a prime.

It is a super-2 number, since 2×425772216481² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (425772210481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212886108240 + 212886108241.

It is an arithmetic number, because the mean of its divisors is an integer number (212886108241).

Almost surely, 2^425772216481 is an apocalyptic number.

It is an amenable number.

425772216481 is a deficient number, since it is larger than the sum of its proper divisors (1).

425772216481 is an equidigital number, since it uses as much as digits as its factorization.

425772216481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1505280, while the sum is 49.

The spelling of 425772216481 in words is "four hundred twenty-five billion, seven hundred seventy-two million, two hundred sixteen thousand, four hundred eighty-one".