225726195371669 has 2 divisors, whose sum is σ = 225726195371670. Its totient is φ = 225726195371668.

The previous prime is 225726195371597. The next prime is 225726195371681. The reversal of 225726195371669 is 966173591627522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128386167500644 + 97340027871025 = 11330762^2 + 9866105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225726195371669 is a prime.

It is a super-2 number, since 2×225726195371669² (a number of 30 digits) contains 22 as substring.

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 (225726195371689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112863097685834 + 112863097685835.

It is an arithmetic number, because the mean of its divisors is an integer number (112863097685835).

Almost surely, 2^{225726195371669} is an apocalyptic number.

It is an amenable number.

225726195371669 is a deficient number, since it is larger than the sum of its proper divisors (1).

225726195371669 is an equidigital number, since it uses as much as digits as its factorization.

225726195371669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 514382400, while the sum is 71.

The spelling of 225726195371669 in words is "two hundred twenty-five trillion, seven hundred twenty-six billion, one hundred ninety-five million, three hundred seventy-one thousand, six hundred sixty-nine".