2265695681 has 2 divisors, whose sum is σ = 2265695682. Its totient is φ = 2265695680.

The previous prime is 2265695647. The next prime is 2265695683. The reversal of 2265695681 is 1865965622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2180890000 + 84805681 = 46700^2 + 9209^2 .

It is a cyclic number.

It is not a de Polignac number, because 2265695681 - 2⁶ = 2265695617 is a prime.

It is a super-2 number, since 2×2265695681² = 10266753837804107522, which contains 22 as substring.

Together with 2265695683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2265695683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1132847840 + 1132847841.

It is an arithmetic number, because the mean of its divisors is an integer number (1132847841).

Almost surely, 2^2265695681 is an apocalyptic number.

It is an amenable number.

2265695681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2265695681 is an equidigital number, since it uses as much as digits as its factorization.

2265695681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1555200, while the sum is 50.

The square root of 2265695681 is about 47599.3243754573. The cubic root of 2265695681 is about 1313.4106260536.

The spelling of 2265695681 in words is "two billion, two hundred sixty-five million, six hundred ninety-five thousand, six hundred eighty-one".