91224130418181 has 12 divisors (see below), whose sum is σ = 131825255622060. Its totient is φ = 60789748219200.

The previous prime is 91224130418147. The next prime is 91224130418287. The reversal of 91224130418181 is 18181403142219.

It is a happy number.

91224130418181 is a `hidden beast` number, since 9 + 1 + 2 + 24 + 1 + 30 + 418 + 181 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 57161674365156 + 34062456053025 = 7560534^2 + 5836305^2 .

It is not a de Polignac number, because 91224130418181 - 2⁹ = 91224130417669 is a prime.

It is a super-2 number, since 2×91224130418181² (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 (91224130413181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2194871920 + ... + 2194913481.

It is an arithmetic number, because the mean of its divisors is an integer number (10985437968505).

Almost surely, 2^{91224130418181} is an apocalyptic number.

It is an amenable number.

91224130418181 is a deficient number, since it is larger than the sum of its proper divisors (40601125203879).

91224130418181 is a wasteful number, since it uses less digits than its factorization.

91224130418181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4389787716 (or 4389787713 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The spelling of 91224130418181 in words is "ninety-one trillion, two hundred twenty-four billion, one hundred thirty million, four hundred eighteen thousand, one hundred eighty-one".