91765850266 has 32 divisors (see below), whose sum is σ = 140431055040. Its totient is φ = 44964533376.

The previous prime is 91765850257. The next prime is 91765850279. The reversal of 91765850266 is 66205856719.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15324525 + ... + 15330511.

It is an arithmetic number, because the mean of its divisors is an integer number (4388470470).

Almost surely, 2^91765850266 is an apocalyptic number.

91765850266 is a deficient number, since it is larger than the sum of its proper divisors (48665204774).

91765850266 is a wasteful number, since it uses less digits than its factorization.

91765850266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6718.

The product of its (nonzero) digits is 5443200, while the sum is 55.

The spelling of 91765850266 in words is "ninety-one billion, seven hundred sixty-five million, eight hundred fifty thousand, two hundred sixty-six".