91105505053 has 2 divisors, whose sum is σ = 91105505054. Its totient is φ = 91105505052.

The previous prime is 91105505011. The next prime is 91105505059. The reversal of 91105505053 is 35050550119.

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., 63402232804 + 27703272249 = 251798^2 + 166443^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91105505053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91105505059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45552752526 + 45552752527.

It is an arithmetic number, because the mean of its divisors is an integer number (45552752527).

Almost surely, 2^91105505053 is an apocalyptic number.

It is an amenable number.

91105505053 is a deficient number, since it is larger than the sum of its proper divisors (1).

91105505053 is an equidigital number, since it uses as much as digits as its factorization.

91105505053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16875, while the sum is 34.

The spelling of 91105505053 in words is "ninety-one billion, one hundred five million, five hundred five thousand, fifty-three".