90563494691 has 2 divisors, whose sum is σ = 90563494692. Its totient is φ = 90563494690.

The previous prime is 90563494667. The next prime is 90563494751. The reversal of 90563494691 is 19649436509.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90563494691 - 2²² = 90559300387 is a prime.

It is not a weakly prime, because it can be changed into another prime (90563496691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45281747345 + 45281747346.

It is an arithmetic number, because the mean of its divisors is an integer number (45281747346).

Almost surely, 2^90563494691 is an apocalyptic number.

90563494691 is a deficient number, since it is larger than the sum of its proper divisors (1).

90563494691 is an equidigital number, since it uses as much as digits as its factorization.

90563494691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6298560, while the sum is 56.

The spelling of 90563494691 in words is "ninety billion, five hundred sixty-three million, four hundred ninety-four thousand, six hundred ninety-one".