90285180509 has 2 divisors, whose sum is σ = 90285180510. Its totient is φ = 90285180508.

The previous prime is 90285180499. The next prime is 90285180551. The reversal of 90285180509 is 90508158209.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62798856409 + 27486324100 = 250597^2 + 165790^2 .

It is a cyclic number.

It is not a de Polignac number, because 90285180509 - 2²⁰ = 90284131933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90285180589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45142590254 + 45142590255.

It is an arithmetic number, because the mean of its divisors is an integer number (45142590255).

Almost surely, 2^90285180509 is an apocalyptic number.

It is an amenable number.

90285180509 is a deficient number, since it is larger than the sum of its proper divisors (1).

90285180509 is an equidigital number, since it uses as much as digits as its factorization.

90285180509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 47.

The spelling of 90285180509 in words is "ninety billion, two hundred eighty-five million, one hundred eighty thousand, five hundred nine".