90986081642321 has 4 divisors (see below), whose sum is σ = 90986106427572. Its totient is φ = 90986056857072.

The previous prime is 90986081642293. The next prime is 90986081642327. The reversal of 90986081642321 is 12324618068909.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 80248899330625 + 10737182311696 = 8958175^2 + 3276764^2 .

It is a cyclic number.

It is not a de Polignac number, because 90986081642321 - 2¹⁸ = 90986081380177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90986081642327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5670866 + ... + 14633211.

It is an arithmetic number, because the mean of its divisors is an integer number (22746526606893).

Almost surely, 2^{90986081642321} is an apocalyptic number.

It is an amenable number.

90986081642321 is a deficient number, since it is larger than the sum of its proper divisors (24785251).

90986081642321 is a wasteful number, since it uses less digits than its factorization.

90986081642321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24785250.

The product of its (nonzero) digits is 8957952, while the sum is 59.

The spelling of 90986081642321 in words is "ninety trillion, nine hundred eighty-six billion, eighty-one million, six hundred forty-two thousand, three hundred twenty-one".