90839064845 has 16 divisors (see below), whose sum is σ = 109809948672. Its totient is φ = 72137674560.

The previous prime is 90839064839. The next prime is 90839064871. The reversal of 90839064845 is 54846093809.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-90839064845 is a prime.

It is a super-2 number, since 2×90839064845² (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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291659 + ... + 516471.

It is an arithmetic number, because the mean of its divisors is an integer number (6863121792).

Almost surely, 2^90839064845 is an apocalyptic number.

It is an amenable number.

90839064845 is a deficient number, since it is larger than the sum of its proper divisors (18970883827).

90839064845 is a wasteful number, since it uses less digits than its factorization.

90839064845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225412.

The product of its (nonzero) digits is 7464960, while the sum is 56.

The spelling of 90839064845 in words is "ninety billion, eight hundred thirty-nine million, sixty-four thousand, eight hundred forty-five".