91723729552896 has 160 divisors (see below), whose sum is σ = 279776557082880. Its totient is φ = 26158868176896.

The previous prime is 91723729552879. The next prime is 91723729552907. The reversal of 91723729552896 is 69825592732719.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1916511 + ... + 13679198.

It is an arithmetic number, because the mean of its divisors is an integer number (1748603481768).

Almost surely, 2^{91723729552896} is an apocalyptic number.

91723729552896 is a gapful number since it is divisible by the number (96) 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 91723729552896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139888278541440).

91723729552896 is an abundant number, since it is smaller than the sum of its proper divisors (188052827529984).

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

91723729552896 is a wasteful number, since it uses less digits than its factorization.

91723729552896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15596284 (or 15596268 counting only the distinct ones).

The product of its digits is 1028764800, while the sum is 75.

The spelling of 91723729552896 in words is "ninety-one trillion, seven hundred twenty-three billion, seven hundred twenty-nine million, five hundred fifty-two thousand, eight hundred ninety-six".