91743449868 has 144 divisors (see below), whose sum is σ = 268800430080. Its totient is φ = 25841192832.

The previous prime is 91743449867. The next prime is 91743449899. The reversal of 91743449868 is 86894434719.

91743449868 is a `hidden beast` number, since 91 + 7 + 43 + 449 + 8 + 68 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (91743449867) 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 47 ways as a sum of consecutive naturals, for example, 14589421 + ... + 14595707.

Almost surely, 2^91743449868 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 91743449868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134400215040).

91743449868 is an abundant number, since it is smaller than the sum of its proper divisors (177056980212).

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

91743449868 is a wasteful number, since it uses less digits than its factorization.

91743449868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7116 (or 7111 counting only the distinct ones).

The product of its digits is 41803776, while the sum is 63.

The spelling of 91743449868 in words is "ninety-one billion, seven hundred forty-three million, four hundred forty-nine thousand, eight hundred sixty-eight".