91749307523771 has 4 divisors (see below), whose sum is σ = 91755108216552. Its totient is φ = 91743506830992.

The previous prime is 91749307523767. The next prime is 91749307523791. The reversal of 91749307523771 is 17732570394719.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91749307523771 - 2² = 91749307523767 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91749307523698 and 91749307523707.

It is not an unprimeable number, because it can be changed into a prime (91749307523701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2900322665 + ... + 2900354298.

It is an arithmetic number, because the mean of its divisors is an integer number (22938777054138).

Almost surely, 2^{91749307523771} is an apocalyptic number.

91749307523771 is a deficient number, since it is larger than the sum of its proper divisors (5800692781).

91749307523771 is a wasteful number, since it uses less digits than its factorization.

91749307523771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5800692780.

The product of its (nonzero) digits is 70013160, while the sum is 65.

The spelling of 91749307523771 in words is "ninety-one trillion, seven hundred forty-nine billion, three hundred seven million, five hundred twenty-three thousand, seven hundred seventy-one".