10991315266 has 16 divisors (see below), whose sum is σ = 16596332928. Its totient is φ = 5459238000.

The previous prime is 10991315249. The next prime is 10991315287. The reversal of 10991315266 is 66251319901.

It is a super-2 number, since 2×10991315266² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 759256 + ... + 773596.

It is an arithmetic number, because the mean of its divisors is an integer number (1037270808).

Almost surely, 2^10991315266 is an apocalyptic number.

10991315266 is a deficient number, since it is larger than the sum of its proper divisors (5605017662).

10991315266 is a wasteful number, since it uses less digits than its factorization.

10991315266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16857.

The product of its (nonzero) digits is 87480, while the sum is 43.

The spelling of 10991315266 in words is "ten billion, nine hundred ninety-one million, three hundred fifteen thousand, two hundred sixty-six".