265190742721 has 2 divisors, whose sum is σ = 265190742722. Its totient is φ = 265190742720.

The previous prime is 265190742631. The next prime is 265190742731. The reversal of 265190742721 is 127247091562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202446003600 + 62744739121 = 449940^2 + 250489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265190742721 is a prime.

It is a super-2 number, since 2×265190742721² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (265190742731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132595371360 + 132595371361.

It is an arithmetic number, because the mean of its divisors is an integer number (132595371361).

Almost surely, 2^265190742721 is an apocalyptic number.

It is an amenable number.

265190742721 is a deficient number, since it is larger than the sum of its proper divisors (1).

265190742721 is an equidigital number, since it uses as much as digits as its factorization.

265190742721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 265190742721 in words is "two hundred sixty-five billion, one hundred ninety million, seven hundred forty-two thousand, seven hundred twenty-one".