9118908181009 has 27 divisors (see below), whose sum is σ = 10070326483707. Its totient is φ = 8251173097200.

The previous prime is 9118908181007. The next prime is 9118908181021. The reversal of 9118908181009 is 9001818098119.

The square root of 9118908181009 is 3019753.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 17994881025 + 9100913299984 = 134145^2 + 3016772^2 .

It is not a de Polignac number, because 9118908181009 - 2¹ = 9118908181007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9118908181007) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 9001883187 + ... + 9001884199.

Almost surely, 2^{9118908181009} is an apocalyptic number.

9118908181009 is the 3019753-rd square number.

9118908181009 is the 1509877-th centered octagonal number.

It is an amenable number.

9118908181009 is a deficient number, since it is larger than the sum of its proper divisors (951418302698).

9118908181009 is an frugal number, since it uses more digits than its factorization.

9118908181009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2590 (or 1295 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 55.

The spelling of 9118908181009 in words is "nine trillion, one hundred eighteen billion, nine hundred eight million, one hundred eighty-one thousand, nine".