91726494720 has 1056 divisors, whose sum is σ = 370176728832. Its totient is φ = 19256573952.

The previous prime is 91726494701. The next prime is 91726494749. The reversal of 91726494720 is 2749462719.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 857256907 + ... + 857257013.

Almost surely, 2^91726494720 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 91726494720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185088364416).

91726494720 is an abundant number, since it is smaller than the sum of its proper divisors (278450234112).

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

91726494720 is a wasteful number, since it uses less digits than its factorization.

91726494720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 51.

The spelling of 91726494720 in words is "ninety-one billion, seven hundred twenty-six million, four hundred ninety-four thousand, seven hundred twenty".