8909406081 has 16 divisors (see below), whose sum is σ = 13230638400. Its totient is φ = 5925420864.

The previous prime is 8909406049. The next prime is 8909406091. The reversal of 8909406081 is 1806049098.

It is not a de Polignac number, because 8909406081 - 2⁵ = 8909406049 is a prime.

It is a super-2 number, since 2×8909406081² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8909406031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382456 + ... + 405081.

It is an arithmetic number, because the mean of its divisors is an integer number (826914900).

Almost surely, 2^8909406081 is an apocalyptic number.

It is an amenable number.

8909406081 is a deficient number, since it is larger than the sum of its proper divisors (4321232319).

8909406081 is a wasteful number, since it uses less digits than its factorization.

8909406081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787965 (or 787959 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 8909406081 is about 94389.6502853994. The cubic root of 8909406081 is about 2073.0809047738.

The spelling of 8909406081 in words is "eight billion, nine hundred nine million, four hundred six thousand, eighty-one".