90543434509 has 8 divisors (see below), whose sum is σ = 98779753152. Its totient is φ = 82307965440.

The previous prime is 90543434489. The next prime is 90543434521.

90543434509 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90543434509 - 2⁹ = 90543433997 is a prime.

It is a super-2 number, since 2×90543434509² (a number of 23 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90543434599) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21672 + ... + 426094.

It is an arithmetic number, because the mean of its divisors is an integer number (12347469144).

Almost surely, 2^90543434509 is an apocalyptic number.

It is an amenable number.

90543434509 is a deficient number, since it is larger than the sum of its proper divisors (8236318643).

90543434509 is a wasteful number, since it uses less digits than its factorization.

90543434509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424787.

The product of its (nonzero) digits is 1166400, while the sum is 46.

The spelling of 90543434509 in words is "ninety billion, five hundred forty-three million, four hundred thirty-four thousand, five hundred nine".