90688840689 has 8 divisors (see below), whose sum is σ = 120956647680. Its totient is φ = 60440130416.

The previous prime is 90688840673. The next prime is 90688840691. The reversal of 90688840689 is 98604888609.

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

It is a cyclic number.

It is not a de Polignac number, because 90688840689 - 2⁴ = 90688840673 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90688840609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4763094 + ... + 4782095.

It is an arithmetic number, because the mean of its divisors is an integer number (15119580960).

Almost surely, 2^90688840689 is an apocalyptic number.

It is an amenable number.

90688840689 is a deficient number, since it is larger than the sum of its proper divisors (30267806991).

90688840689 is a wasteful number, since it uses less digits than its factorization.

90688840689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9548359.

The product of its (nonzero) digits is 47775744, while the sum is 66.

The spelling of 90688840689 in words is "ninety billion, six hundred eighty-eight million, eight hundred forty thousand, six hundred eighty-nine".