91216967706 has 12 divisors (see below), whose sum is σ = 197636763402. Its totient is φ = 30405655896.

The previous prime is 91216967689. The next prime is 91216967707. The reversal of 91216967706 is 60776961219.

It can be written as a sum of positive squares in only one way, i.e., 87488766225 + 3728201481 = 295785^2 + 61059^2 .

It is not an unprimeable number, because it can be changed into a prime (91216967707) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 2533804641 + ... + 2533804676.

Almost surely, 2^91216967706 is an apocalyptic number.

91216967706 is an abundant number, since it is smaller than the sum of its proper divisors (106419795696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91216967706 is a wasteful number, since it uses less digits than its factorization.

91216967706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5067609325 (or 5067609322 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 54.

The spelling of 91216967706 in words is "ninety-one billion, two hundred sixteen million, nine hundred sixty-seven thousand, seven hundred six".