90055055009 has 4 divisors (see below), whose sum is σ = 95352411204. Its totient is φ = 84757698816.

The previous prime is 90055054987. The next prime is 90055055011.

It is a happy number.

90055055009 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 68549712400 + 21505342609 = 261820^2 + 146647^2 .

It is a cyclic number.

It is not a de Polignac number, because 90055055009 - 2²⁰ = 90054006433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90055055509) 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, 2648678072 + ... + 2648678105.

It is an arithmetic number, because the mean of its divisors is an integer number (23838102801).

Almost surely, 2^90055055009 is an apocalyptic number.

It is an amenable number.

90055055009 is a deficient number, since it is larger than the sum of its proper divisors (5297356195).

90055055009 is a wasteful number, since it uses less digits than its factorization.

90055055009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5297356194.

The product of its (nonzero) digits is 50625, while the sum is 38.

It can be divided in two parts, 900550 and 55009, that added together give a palindrome (955559).

The spelling of 90055055009 in words is "ninety billion, fifty-five million, fifty-five thousand, nine".