91749777699 has 8 divisors (see below), whose sum is σ = 129529098000. Its totient is φ = 57568487936.

The previous prime is 91749777671. The next prime is 91749777701. The reversal of 91749777699 is 99677794719.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91749777699 - 2⁵ = 91749777667 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91749777699.

It is not an unprimeable number, because it can be changed into a prime (91749777629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 899507574 + ... + 899507675.

It is an arithmetic number, because the mean of its divisors is an integer number (16191137250).

Almost surely, 2^91749777699 is an apocalyptic number.

91749777699 is a deficient number, since it is larger than the sum of its proper divisors (37779320301).

91749777699 is a wasteful number, since it uses less digits than its factorization.

91749777699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1799015269.

The product of its digits is 378071064, while the sum is 75.

The spelling of 91749777699 in words is "ninety-one billion, seven hundred forty-nine million, seven hundred seventy-seven thousand, six hundred ninety-nine".