90436839668804 has 12 divisors (see below), whose sum is σ = 158318874552300. Its totient is φ = 45202875511008.

The previous prime is 90436839668803. The next prime is 90436839668951. The reversal of 90436839668804 is 40886693863409.

It can be written as a sum of positive squares in 2 ways, for example, as 80850632923204 + 9586206745600 = 8991698^2 + 3096160^2 .

It is a super-3 number, since 3×90436839668804³ (a number of 43 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (90436839668803) 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, 3886067759 + ... + 3886091030.

It is an arithmetic number, because the mean of its divisors is an integer number (13193239546025).

Almost surely, 2^{90436839668804} is an apocalyptic number.

It is an amenable number.

90436839668804 is a deficient number, since it is larger than the sum of its proper divisors (67882034883496).

90436839668804 is a wasteful number, since it uses less digits than its factorization.

90436839668804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7772161702 (or 7772161700 counting only the distinct ones).

The product of its (nonzero) digits is 1289945088, while the sum is 74.

The spelling of 90436839668804 in words is "ninety trillion, four hundred thirty-six billion, eight hundred thirty-nine million, six hundred sixty-eight thousand, eight hundred four".