91320362355421 has 2 divisors, whose sum is σ = 91320362355422. Its totient is φ = 91320362355420.

The previous prime is 91320362355401. The next prime is 91320362355457. The reversal of 91320362355421 is 12455326302319.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90540648631225 + 779713724196 = 9515285^2 + 883014^2 .

It is a cyclic number.

It is not a de Polignac number, because 91320362355421 - 2³⁷ = 91182923401949 is a prime.

It is a super-2 number, since 2×91320362355421² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91320362355401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45660181177710 + 45660181177711.

It is an arithmetic number, because the mean of its divisors is an integer number (45660181177711).

Almost surely, 2^{91320362355421} is an apocalyptic number.

It is an amenable number.

91320362355421 is a deficient number, since it is larger than the sum of its proper divisors (1).

91320362355421 is an equidigital number, since it uses as much as digits as its factorization.

91320362355421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1166400, while the sum is 46.

The spelling of 91320362355421 in words is "ninety-one trillion, three hundred twenty billion, three hundred sixty-two million, three hundred fifty-five thousand, four hundred twenty-one".