90218953633 has 2 divisors, whose sum is σ = 90218953634. Its totient is φ = 90218953632.

The previous prime is 90218953631. The next prime is 90218953651. The reversal of 90218953633 is 33635981209.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74219739489 + 15999214144 = 272433^2 + 126488^2 .

It is a cyclic number.

It is not a de Polignac number, because 90218953633 - 2¹ = 90218953631 is a prime.

Together with 90218953631, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (90218953631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45109476816 + 45109476817.

It is an arithmetic number, because the mean of its divisors is an integer number (45109476817).

Almost surely, 2^90218953633 is an apocalyptic number.

It is an amenable number.

90218953633 is a deficient number, since it is larger than the sum of its proper divisors (1).

90218953633 is an equidigital number, since it uses as much as digits as its factorization.

90218953633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1049760, while the sum is 49.

The spelling of 90218953633 in words is "ninety billion, two hundred eighteen million, nine hundred fifty-three thousand, six hundred thirty-three".