91749547293 has 16 divisors (see below), whose sum is σ = 122574306816. Its totient is φ = 61045654320.

The previous prime is 91749547291. The next prime is 91749547301. The reversal of 91749547293 is 39274594719.

It is not a de Polignac number, because 91749547293 - 2¹ = 91749547291 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91749547291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5797930 + ... + 5813732.

It is an arithmetic number, because the mean of its divisors is an integer number (7660894176).

Almost surely, 2^91749547293 is an apocalyptic number.

It is an amenable number.

91749547293 is a deficient number, since it is larger than the sum of its proper divisors (30824759523).

91749547293 is a wasteful number, since it uses less digits than its factorization.

91749547293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19504.

The product of its digits is 17146080, while the sum is 60.

The spelling of 91749547293 in words is "ninety-one billion, seven hundred forty-nine million, five hundred forty-seven thousand, two hundred ninety-three".