90090909009 has 24 divisors (see below), whose sum is σ = 131355544320. Its totient is φ = 59495832288.

The previous prime is 90090908933. The next prime is 90090909031.

90090909009 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 90090909009 - 2⁸ = 90090908753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90090909509) 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, 5924514 + ... + 5939700.

It is an arithmetic number, because the mean of its divisors is an integer number (5473147680).

Almost surely, 2^90090909009 is an apocalyptic number.

It is an amenable number.

90090909009 is a deficient number, since it is larger than the sum of its proper divisors (41264635311).

90090909009 is a wasteful number, since it uses less digits than its factorization.

90090909009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21349 (or 21346 counting only the distinct ones).

The product of its (nonzero) digits is 59049, while the sum is 45.

The spelling of 90090909009 in words is "ninety billion, ninety million, nine hundred nine thousand, nine".