90431030569 has 24 divisors (see below), whose sum is σ = 99834742280. Its totient is φ = 81850728960.

The previous prime is 90431030519. The next prime is 90431030623. The reversal of 90431030569 is 96503013409.

It can be written as a sum of positive squares in 4 ways, for example, as 60128924944 + 30302105625 = 245212^2 + 174075^2 .

It is not a de Polignac number, because 90431030569 - 2¹³ = 90431022377 is a prime.

It is a super-2 number, since 2×90431030569² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90431030519) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44568247 + ... + 44570275.

Almost surely, 2^90431030569 is an apocalyptic number.

It is an amenable number.

90431030569 is a deficient number, since it is larger than the sum of its proper divisors (9403711711).

90431030569 is a wasteful number, since it uses less digits than its factorization.

90431030569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3481 (or 3470 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 40.

The spelling of 90431030569 in words is "ninety billion, four hundred thirty-one million, thirty thousand, five hundred sixty-nine".