91388886845 has 8 divisors (see below), whose sum is σ = 109679057664. Its totient is φ = 73102847184.

The previous prime is 91388886839. The next prime is 91388886851. The reversal of 91388886845 is 54868888319.

It is an interprime number because it is at equal distance from previous prime (91388886839) and next prime (91388886851).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91388886845 - 2⁴ = 91388886829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 983909 + ... + 1072778.

It is an arithmetic number, because the mean of its divisors is an integer number (13709882208).

Almost surely, 2^91388886845 is an apocalyptic number.

It is an amenable number.

91388886845 is a deficient number, since it is larger than the sum of its proper divisors (18290170819).

91388886845 is a wasteful number, since it uses less digits than its factorization.

91388886845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065579.

The product of its digits is 106168320, while the sum is 68.

The spelling of 91388886845 in words is "ninety-one billion, three hundred eighty-eight million, eight hundred eighty-six thousand, eight hundred forty-five".