90663415685 has 8 divisors (see below), whose sum is σ = 109109634336. Its totient is φ = 72321708880.

The previous prime is 90663415643. The next prime is 90663415723. The reversal of 90663415685 is 58651436609.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90663415685 - 2¹⁴ = 90663399301 is a prime.

It is a super-2 number, since 2×90663415685² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 26126051 + ... + 26129520.

It is an arithmetic number, because the mean of its divisors is an integer number (13638704292).

Almost surely, 2^90663415685 is an apocalyptic number.

It is an amenable number.

90663415685 is a deficient number, since it is larger than the sum of its proper divisors (18446218651).

90663415685 is a wasteful number, since it uses less digits than its factorization.

90663415685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52255923.

The product of its (nonzero) digits is 4665600, while the sum is 53.

The spelling of 90663415685 in words is "ninety billion, six hundred sixty-three million, four hundred fifteen thousand, six hundred eighty-five".