265542245569 has 2 divisors, whose sum is σ = 265542245570. Its totient is φ = 265542245568.

The previous prime is 265542245533. The next prime is 265542245599. The reversal of 265542245569 is 965542245562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207972481600 + 57569763969 = 456040^2 + 239937^2 .

It is a cyclic number.

It is not a de Polignac number, because 265542245569 - 2⁹ = 265542245057 is a prime.

It is a super-2 number, since 2×265542245569² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (265542245519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132771122784 + 132771122785.

It is an arithmetic number, because the mean of its divisors is an integer number (132771122785).

Almost surely, 2^265542245569 is an apocalyptic number.

It is an amenable number.

265542245569 is a deficient number, since it is larger than the sum of its proper divisors (1).

265542245569 is an equidigital number, since it uses as much as digits as its factorization.

265542245569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920000, while the sum is 55.

The spelling of 265542245569 in words is "two hundred sixty-five billion, five hundred forty-two million, two hundred forty-five thousand, five hundred sixty-nine".