91745381026 has 8 divisors (see below), whose sum is σ = 148204077084. Its totient is φ = 42344022000.

The previous prime is 91745381017. The next prime is 91745381047. The reversal of 91745381026 is 62018354719.

It is a Cunningham number, because it is equal to 302895²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 91745381025 + 1 = 302895^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1764334225 + ... + 1764334276.

It is a 2-persistent number, because it is pandigital, and so is 2⋅91745381026 = 183490762052, but 3⋅91745381026 = 275236143078 is not.

Almost surely, 2^91745381026 is an apocalyptic number.

91745381026 is a deficient number, since it is larger than the sum of its proper divisors (56458696058).

91745381026 is a wasteful number, since it uses less digits than its factorization.

91745381026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3528668516.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 91745381026 in words is "ninety-one billion, seven hundred forty-five million, three hundred eighty-one thousand, twenty-six".