90206859645841 has 4 divisors (see below), whose sum is σ = 90416156304384. Its totient is φ = 89997562987300.

The previous prime is 90206859645839. The next prime is 90206859645853. The reversal of 90206859645841 is 14854695860209.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90206859645841 - 2¹ = 90206859645839 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90206859645341) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 104648328625 + ... + 104648329486.

It is an arithmetic number, because the mean of its divisors is an integer number (22604039076096).

Almost surely, 2^{90206859645841} is an apocalyptic number.

It is an amenable number.

90206859645841 is a deficient number, since it is larger than the sum of its proper divisors (209296658543).

90206859645841 is a wasteful number, since it uses less digits than its factorization.

90206859645841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209296658542.

The product of its (nonzero) digits is 149299200, while the sum is 67.

The spelling of 90206859645841 in words is "ninety trillion, two hundred six billion, eight hundred fifty-nine million, six hundred forty-five thousand, eight hundred forty-one".