91779098043141 has 24 divisors (see below), whose sum is σ = 133417339204344. Its totient is φ = 60794915575680.

The previous prime is 91779098043137. The next prime is 91779098043169. The reversal of 91779098043141 is 14134089097719.

91779098043141 is a `hidden beast` number, since 9 + 1 + 7 + 79 + 0 + 98 + 0 + 431 + 41 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 60052115448900 + 31726982594241 = 7749330^2 + 5632671^2 .

It is not a de Polignac number, because 91779098043141 - 2² = 91779098043137 is a prime.

It is a super-2 number, since 2×91779098043141² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91779098043341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61120755 + ... + 62604351.

It is an arithmetic number, because the mean of its divisors is an integer number (5559055800181).

Almost surely, 2^{91779098043141} is an apocalyptic number.

It is an amenable number.

91779098043141 is a deficient number, since it is larger than the sum of its proper divisors (41638241161203).

91779098043141 is a wasteful number, since it uses less digits than its factorization.

91779098043141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527541 (or 1527538 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 63.

The spelling of 91779098043141 in words is "ninety-one trillion, seven hundred seventy-nine billion, ninety-eight million, forty-three thousand, one hundred forty-one".