91778345701163 has 24 divisors (see below), whose sum is σ = 101891542198320. Its totient is φ = 82599566860800.

The previous prime is 91778345701129. The next prime is 91778345701183. The reversal of 91778345701163 is 36110754387719.

It is not a de Polignac number, because 91778345701163 - 2⁶ = 91778345701099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91778345701096 and 91778345701105.

It is not an unprimeable number, because it can be changed into a prime (91778345701123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16897703 + ... + 21658463.

It is an arithmetic number, because the mean of its divisors is an integer number (4245480924930).

Almost surely, 2^{91778345701163} is an apocalyptic number.

91778345701163 is a deficient number, since it is larger than the sum of its proper divisors (10113196497157).

91778345701163 is a wasteful number, since it uses less digits than its factorization.

91778345701163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4762379 (or 4762368 counting only the distinct ones).

The product of its (nonzero) digits is 26671680, while the sum is 62.

The spelling of 91778345701163 in words is "ninety-one trillion, seven hundred seventy-eight billion, three hundred forty-five million, seven hundred one thousand, one hundred sixty-three".