90657684163 has 2 divisors, whose sum is σ = 90657684164. Its totient is φ = 90657684162.

The previous prime is 90657684149. The next prime is 90657684223. The reversal of 90657684163 is 36148675609.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90657684163 is a prime.

It is a super-2 number, since 2×90657684163² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90657684263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45328842081 + 45328842082.

It is an arithmetic number, because the mean of its divisors is an integer number (45328842082).

Almost surely, 2^90657684163 is an apocalyptic number.

90657684163 is a deficient number, since it is larger than the sum of its proper divisors (1).

90657684163 is an equidigital number, since it uses as much as digits as its factorization.

90657684163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6531840, while the sum is 55.

The spelling of 90657684163 in words is "ninety billion, six hundred fifty-seven million, six hundred eighty-four thousand, one hundred sixty-three".