91598268533 has 2 divisors, whose sum is σ = 91598268534. Its totient is φ = 91598268532.

The previous prime is 91598268527. The next prime is 91598268583. The reversal of 91598268533 is 33586289519.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78996409969 + 12601858564 = 281063^2 + 112258^2 .

It is an emirp because it is prime and its reverse (33586289519) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91598268533 - 2¹⁸ = 91598006389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91598268583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45799134266 + 45799134267.

It is an arithmetic number, because the mean of its divisors is an integer number (45799134267).

Almost surely, 2^91598268533 is an apocalyptic number.

It is an amenable number.

91598268533 is a deficient number, since it is larger than the sum of its proper divisors (1).

91598268533 is an equidigital number, since it uses as much as digits as its factorization.

91598268533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13996800, while the sum is 59.

The spelling of 91598268533 in words is "ninety-one billion, five hundred ninety-eight million, two hundred sixty-eight thousand, five hundred thirty-three".