91263321100 has 144 divisors (see below), whose sum is σ = 234624983040. Its totient is φ = 30152505600.

The previous prime is 91263321049. The next prime is 91263321133. The reversal of 91263321100 is 112336219.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5177502 + ... + 5195098.

It is an arithmetic number, because the mean of its divisors is an integer number (1629340160).

Almost surely, 2^91263321100 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 91263321100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117312491520).

91263321100 is an abundant number, since it is smaller than the sum of its proper divisors (143361661940).

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

91263321100 is a wasteful number, since it uses less digits than its factorization.

91263321100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17888 (or 17881 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

Adding to 91263321100 its reverse (112336219), we get a palindrome (91375657319).

The spelling of 91263321100 in words is "ninety-one billion, two hundred sixty-three million, three hundred twenty-one thousand, one hundred".