91011346993 has 32 divisors (see below), whose sum is σ = 109087784960. Its totient is φ = 74290582080.

The previous prime is 91011346981. The next prime is 91011347023. The reversal of 91011346993 is 39964311019.

It is a cyclic number.

It is not a de Polignac number, because 91011346993 - 2¹⁷ = 91011215921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91011346793) 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 31 ways as a sum of consecutive naturals, for example, 5254255 + ... + 5271547.

It is an arithmetic number, because the mean of its divisors is an integer number (3408993280).

Almost surely, 2^91011346993 is an apocalyptic number.

It is an amenable number.

91011346993 is a deficient number, since it is larger than the sum of its proper divisors (18076437967).

91011346993 is a wasteful number, since it uses less digits than its factorization.

91011346993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17717.

The product of its (nonzero) digits is 157464, while the sum is 46.

The spelling of 91011346993 in words is "ninety-one billion, eleven million, three hundred forty-six thousand, nine hundred ninety-three".