265640506306433 has 2 divisors, whose sum is σ = 265640506306434. Its totient is φ = 265640506306432.

The previous prime is 265640506306423. The next prime is 265640506306459. The reversal of 265640506306433 is 334603605046562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184088914435969 + 81551591870464 = 13567937^2 + 9030592^2 .

It is a cyclic number.

It is not a de Polignac number, because 265640506306433 - 2¹⁰ = 265640506305409 is a prime.

It is not a weakly prime, because it can be changed into another prime (265640506306423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132820253153216 + 132820253153217.

It is an arithmetic number, because the mean of its divisors is an integer number (132820253153217).

Almost surely, 2^{265640506306433} is an apocalyptic number.

It is an amenable number.

265640506306433 is a deficient number, since it is larger than the sum of its proper divisors (1).

265640506306433 is an equidigital number, since it uses as much as digits as its factorization.

265640506306433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27993600, while the sum is 53.

The spelling of 265640506306433 in words is "two hundred sixty-five trillion, six hundred forty billion, five hundred six million, three hundred six thousand, four hundred thirty-three".