91853226649 has 2 divisors, whose sum is σ = 91853226650. Its totient is φ = 91853226648.

The previous prime is 91853226629. The next prime is 91853226653. The reversal of 91853226649 is 94662235819.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62870547600 + 28982679049 = 250740^2 + 170243^2 .

It is a cyclic number.

It is not a de Polignac number, because 91853226649 - 2⁵ = 91853226617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91853226649.

It is not a weakly prime, because it can be changed into another prime (91853226629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45926613324 + 45926613325.

It is an arithmetic number, because the mean of its divisors is an integer number (45926613325).

Almost surely, 2^91853226649 is an apocalyptic number.

It is an amenable number.

91853226649 is a deficient number, since it is larger than the sum of its proper divisors (1).

91853226649 is an equidigital number, since it uses as much as digits as its factorization.

91853226649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5598720, while the sum is 55.

The spelling of 91853226649 in words is "ninety-one billion, eight hundred fifty-three million, two hundred twenty-six thousand, six hundred forty-nine".