91109667002 has 16 divisors (see below), whose sum is σ = 137471641992. Its totient is φ = 45285852480.

The previous prime is 91109667001. The next prime is 91109667029. The reversal of 91109667002 is 20076690119.

It can be written as a sum of positive squares in 4 ways, for example, as 75977960881 + 15131706121 = 275641^2 + 123011^2 .

It is not an unprimeable number, because it can be changed into a prime (91109667001) 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 7 ways as a sum of consecutive naturals, for example, 4750352 + ... + 4769492.

Almost surely, 2^91109667002 is an apocalyptic number.

91109667002 is a deficient number, since it is larger than the sum of its proper divisors (46361974990).

91109667002 is a wasteful number, since it uses less digits than its factorization.

91109667002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33073.

The product of its (nonzero) digits is 40824, while the sum is 41.

The spelling of 91109667002 in words is "ninety-one billion, one hundred nine million, six hundred sixty-seven thousand, two".