265809318667 has 2 divisors, whose sum is σ = 265809318668. Its totient is φ = 265809318666.

The previous prime is 265809318653. The next prime is 265809318703. The reversal of 265809318667 is 766813908562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 265809318667 - 2¹⁹ = 265808794379 is a prime.

It is not a weakly prime, because it can be changed into another prime (265809318767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132904659333 + 132904659334.

It is an arithmetic number, because the mean of its divisors is an integer number (132904659334).

Almost surely, 2^265809318667 is an apocalyptic number.

265809318667 is a deficient number, since it is larger than the sum of its proper divisors (1).

265809318667 is an equidigital number, since it uses as much as digits as its factorization.

265809318667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26127360, while the sum is 61.

The spelling of 265809318667 in words is "two hundred sixty-five billion, eight hundred nine million, three hundred eighteen thousand, six hundred sixty-seven".