266155511015291 has 2 divisors, whose sum is σ = 266155511015292. Its totient is φ = 266155511015290.

The previous prime is 266155511015267. The next prime is 266155511015411. The reversal of 266155511015291 is 192510115551662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 266155511015291 - 2⁶ = 266155511015227 is a prime.

It is not a weakly prime, because it can be changed into another prime (266155511015201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133077755507645 + 133077755507646.

It is an arithmetic number, because the mean of its divisors is an integer number (133077755507646).

Almost surely, 2^{266155511015291} is an apocalyptic number.

266155511015291 is a deficient number, since it is larger than the sum of its proper divisors (1).

266155511015291 is an equidigital number, since it uses as much as digits as its factorization.

266155511015291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810000, while the sum is 50.

The spelling of 266155511015291 in words is "two hundred sixty-six trillion, one hundred fifty-five billion, five hundred eleven million, fifteen thousand, two hundred ninety-one".