265453977617 has 2 divisors, whose sum is σ = 265453977618. Its totient is φ = 265453977616.

The previous prime is 265453977539. The next prime is 265453977641. The reversal of 265453977617 is 716779354562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 238518931456 + 26935046161 = 488384^2 + 164119^2 .

It is a cyclic number.

It is not a de Polignac number, because 265453977617 - 2⁸ = 265453977361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 265453977617.

It is not a weakly prime, because it can be changed into another prime (265453977697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132726988808 + 132726988809.

It is an arithmetic number, because the mean of its divisors is an integer number (132726988809).

Almost surely, 2^265453977617 is an apocalyptic number.

It is an amenable number.

265453977617 is a deficient number, since it is larger than the sum of its proper divisors (1).

265453977617 is an equidigital number, since it uses as much as digits as its factorization.

265453977617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 66679200, while the sum is 62.

The spelling of 265453977617 in words is "two hundred sixty-five billion, four hundred fifty-three million, nine hundred seventy-seven thousand, six hundred seventeen".