91147793705 has 8 divisors (see below), whose sum is σ = 109381588800. Its totient is φ = 72915410736.

The previous prime is 91147793699. The next prime is 91147793707. The reversal of 91147793705 is 50739774119.

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 91147793705 - 2⁴ = 91147793689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91147793707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205415 + ... + 473804.

It is an arithmetic number, because the mean of its divisors is an integer number (13672698600).

Almost surely, 2^91147793705 is an apocalyptic number.

It is an amenable number.

91147793705 is a deficient number, since it is larger than the sum of its proper divisors (18233795095).

91147793705 is a wasteful number, since it uses less digits than its factorization.

91147793705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706063.

The product of its (nonzero) digits is 1666980, while the sum is 53.

The spelling of 91147793705 in words is "ninety-one billion, one hundred forty-seven million, seven hundred ninety-three thousand, seven hundred five".