8947646465 has 16 divisors (see below), whose sum is σ = 11413038672. Its totient is φ = 6710820864.

The previous prime is 8947646453. The next prime is 8947646473. The reversal of 8947646465 is 5646467498.

It is a Cunningham number, because it is equal to 94592²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 7376656 + 8940269809 = 2716^2 + 94553^2 .

It is a cyclic number.

It is not a de Polignac number, because 8947646465 - 2¹² = 8947642369 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182954 + ... + 226643.

It is an arithmetic number, because the mean of its divisors is an integer number (713314917).

Almost surely, 2^8947646465 is an apocalyptic number.

8947646465 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8947646465 is a deficient number, since it is larger than the sum of its proper divisors (2465392207).

8947646465 is a wasteful number, since it uses less digits than its factorization.

8947646465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409876.

The product of its digits is 34836480, while the sum is 59.

The square root of 8947646465 is about 94592.0000052859. Note that the first 5 decimals coincide. The cubic root of 8947646465 is about 2076.0426532353.

The spelling of 8947646465 in words is "eight billion, nine hundred forty-seven million, six hundred forty-six thousand, four hundred sixty-five".