265980511 has 2 divisors, whose sum is σ = 265980512. Its totient is φ = 265980510.

The previous prime is 265980509. The next prime is 265980529. The reversal of 265980511 is 115089562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 265980511 - 2¹ = 265980509 is a prime.

It is a super-2 number, since 2×265980511² = 141491264463642242, which contains 22 as substring.

Together with 265980509, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265980551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132990255 + 132990256.

It is an arithmetic number, because the mean of its divisors is an integer number (132990256).

Almost surely, 2^265980511 is an apocalyptic number.

265980511 is a deficient number, since it is larger than the sum of its proper divisors (1).

265980511 is an equidigital number, since it uses as much as digits as its factorization.

265980511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 37.

The square root of 265980511 is about 16308.9089457266. The cubic root of 265980511 is about 643.1070522137.

The spelling of 265980511 in words is "two hundred sixty-five million, nine hundred eighty thousand, five hundred eleven".