91109667000 has 256 divisors, whose sum is σ = 317672409600. Its totient is φ = 21548160000.

The previous prime is 91109666993. The next prime is 91109667001. The reversal of 91109667000 is 76690119.

It is a self number, because there is not a number n which added to its sum of digits gives 91109667000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91109667001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1319331 + ... + 1386669.

It is an arithmetic number, because the mean of its divisors is an integer number (1240907850).

Almost surely, 2^91109667000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91109667000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158836204800).

91109667000 is an abundant number, since it is smaller than the sum of its proper divisors (226562742600).

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

91109667000 is a wasteful number, since it uses less digits than its factorization.

91109667000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67415 (or 67401 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 39.

The spelling of 91109667000 in words is "ninety-one billion, one hundred nine million, six hundred sixty-seven thousand".