90564446509 has 4 divisors (see below), whose sum is σ = 90565827840. Its totient is φ = 90563065180.

The previous prime is 90564446507. The next prime is 90564446537.

90564446509 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90564446509 - 2¹ = 90564446507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90564446501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 587149 + ... + 725170.

It is an arithmetic number, because the mean of its divisors is an integer number (22641456960).

Almost surely, 2^90564446509 is an apocalyptic number.

It is an amenable number.

90564446509 is a deficient number, since it is larger than the sum of its proper divisors (1381331).

90564446509 is a wasteful number, since it uses less digits than its factorization.

90564446509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381330.

The product of its (nonzero) digits is 4665600, while the sum is 52.

The spelling of 90564446509 in words is "ninety billion, five hundred sixty-four million, four hundred forty-six thousand, five hundred nine".