846868868649 has 48 divisors (see below), whose sum is σ = 1292672908800. Its totient is φ = 533383901568.

The previous prime is 846868868609. The next prime is 846868868689. The reversal of 846868868649 is 946868868648.

It is an interprime number because it is at equal distance from previous prime (846868868609) and next prime (846868868689).

It is not a de Polignac number, because 846868868649 - 2¹² = 846868864553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (846868868609) 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 47 ways as a sum of consecutive naturals, for example, 92721687 + ... + 92730819.

It is an arithmetic number, because the mean of its divisors is an integer number (26930685600).

Almost surely, 2^846868868649 is an apocalyptic number.

It is an amenable number.

846868868649 is a deficient number, since it is larger than the sum of its proper divisors (445804040151).

846868868649 is a wasteful number, since it uses less digits than its factorization.

846868868649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16774 (or 16771 counting only the distinct ones).

The product of its digits is 6115295232, while the sum is 81.

Subtracting 846868868649 from its reverse (946868868648), we obtain a palindrome (99999999999).

The spelling of 846868868649 in words is "eight hundred forty-six billion, eight hundred sixty-eight million, eight hundred sixty-eight thousand, six hundred forty-nine".