91355814853 has 2 divisors, whose sum is σ = 91355814854. Its totient is φ = 91355814852.

The previous prime is 91355814841. The next prime is 91355814859. The reversal of 91355814853 is 35841855319.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71105955649 + 20249859204 = 266657^2 + 142302^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91355814853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91355814853.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91355814859) 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 as a sum of consecutive naturals, namely, 45677907426 + 45677907427.

It is an arithmetic number, because the mean of its divisors is an integer number (45677907427).

Almost surely, 2^91355814853 is an apocalyptic number.

It is an amenable number.

91355814853 is a deficient number, since it is larger than the sum of its proper divisors (1).

91355814853 is an equidigital number, since it uses as much as digits as its factorization.

91355814853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592000, while the sum is 52.

The spelling of 91355814853 in words is "ninety-one billion, three hundred fifty-five million, eight hundred fourteen thousand, eight hundred fifty-three".