90339265061809 has 3 divisors (see below), whose sum is σ = 90339274566507. Its totient is φ = 90339255557112.

The previous prime is 90339265061807. The next prime is 90339265061819. The reversal of 90339265061809 is 90816056293309.

The square root of 90339265061809 is 9504697.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 58933642080625 + 31405622981184 = 7676825^2 + 5604072^2 .

It is not a de Polignac number, because 90339265061809 - 2¹ = 90339265061807 is a prime.

It is a super-2 number, since 2×90339265061809² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90339265061803) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4752349 + ... + 14257045.

It is an arithmetic number, because the mean of its divisors is an integer number (30113091522169).

Almost surely, 2^{90339265061809} is an apocalyptic number.

90339265061809 is the 9504697-th square number.

90339265061809 is the 4752349-th centered octagonal number.

It is an amenable number.

90339265061809 is a deficient number, since it is larger than the sum of its proper divisors (9504698).

90339265061809 is an frugal number, since it uses more digits than its factorization.

90339265061809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19009394 (or 9504697 counting only the distinct ones).

The product of its (nonzero) digits is 18895680, while the sum is 61.

The spelling of 90339265061809 in words is "ninety trillion, three hundred thirty-nine billion, two hundred sixty-five million, sixty-one thousand, eight hundred nine".