91743840000 has 450 divisors, whose sum is σ = 341893277880. Its totient is φ = 24461568000.

The previous prime is 91743839933. The next prime is 91743840011. The reversal of 91743840000 is 4834719.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (450).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 49 ways as a sum of consecutive naturals, for example, 12956461 + ... + 12963539.

Almost surely, 2^91743840000 is an apocalyptic number.

91743840000 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91743840000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170946638940).

91743840000 is an abundant number, since it is smaller than the sum of its proper divisors (250149437880).

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

91743840000 is an frugal number, since it uses more digits than its factorization.

91743840000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7127 (or 7089 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 91743840000 in words is "ninety-one billion, seven hundred forty-three million, eight hundred forty thousand".