8564981409 has 12 divisors (see below), whose sum is σ = 12634866816. Its totient is φ = 5588498232.

The previous prime is 8564981387. The next prime is 8564981461. The reversal of 8564981409 is 9041894658.

8564981409 is a `hidden beast` number, since 8 + 5 + 6 + 498 + 140 + 9 = 666.

It is not a de Polignac number, because 8564981409 - 2⁸ = 8564981153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8564981479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10123669 + ... + 10124514.

It is an arithmetic number, because the mean of its divisors is an integer number (1052905568).

Almost surely, 2^8564981409 is an apocalyptic number.

It is an amenable number.

8564981409 is a deficient number, since it is larger than the sum of its proper divisors (4069885407).

8564981409 is a wasteful number, since it uses less digits than its factorization.

8564981409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20248236 (or 20248233 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The square root of 8564981409 is about 92547.1847707968. The cubic root of 8564981409 is about 2046.0149758251.

The spelling of 8564981409 in words is "eight billion, five hundred sixty-four million, nine hundred eighty-one thousand, four hundred nine".