265854670817 has 2 divisors, whose sum is σ = 265854670818. Its totient is φ = 265854670816.

The previous prime is 265854670747. The next prime is 265854670841. The reversal of 265854670817 is 718076458562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215960960656 + 49893710161 = 464716^2 + 223369^2 .

It is a cyclic number.

It is not a de Polignac number, because 265854670817 - 2²⁰ = 265853622241 is a prime.

It is not a weakly prime, because it can be changed into another prime (265854670717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132927335408 + 132927335409.

It is an arithmetic number, because the mean of its divisors is an integer number (132927335409).

Almost surely, 2^265854670817 is an apocalyptic number.

It is an amenable number.

265854670817 is a deficient number, since it is larger than the sum of its proper divisors (1).

265854670817 is an equidigital number, since it uses as much as digits as its factorization.

265854670817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22579200, while the sum is 59.

The spelling of 265854670817 in words is "two hundred sixty-five billion, eight hundred fifty-four million, six hundred seventy thousand, eight hundred seventeen".