91072116767 has 4 divisors (see below), whose sum is σ = 91073389920. Its totient is φ = 91070843616.

The previous prime is 91072116731. The next prime is 91072116787. The reversal of 91072116767 is 76761127019.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91072116767 - 2⁶ = 91072116703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91072116787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 522458 + ... + 674615.

It is an arithmetic number, because the mean of its divisors is an integer number (22768347480).

Almost surely, 2^91072116767 is an apocalyptic number.

91072116767 is a deficient number, since it is larger than the sum of its proper divisors (1273153).

91072116767 is a wasteful number, since it uses less digits than its factorization.

91072116767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273152.

The product of its (nonzero) digits is 222264, while the sum is 47.

The spelling of 91072116767 in words is "ninety-one billion, seventy-two million, one hundred sixteen thousand, seven hundred sixty-seven".