91226852658 has 18 divisors (see below), whose sum is σ = 197660957247. Its totient is φ = 30408523740.

The previous prime is 91226852653. The next prime is 91226852711. The reversal of 91226852658 is 85625862219.

91226852658 is a `hidden beast` number, since 9 + 1 + 2 + 2 + 68 + 526 + 58 = 666.

It can be written as a sum of positive squares in only one way, i.e., 45613426329 + 45613426329 = 213573^2 + 213573^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=213573.

It is not an unprimeable number, because it can be changed into a prime (91226852653) 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 8 ways as a sum of consecutive naturals, for example, 1245843 + ... + 1317033.

Almost surely, 2^91226852658 is an apocalyptic number.

91226852658 is an abundant number, since it is smaller than the sum of its proper divisors (106434104589).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91226852658 is an frugal number, since it uses more digits than its factorization.

91226852658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142390 (or 71196 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 54.

The spelling of 91226852658 in words is "ninety-one billion, two hundred twenty-six million, eight hundred fifty-two thousand, six hundred fifty-eight".