846646647 has 48 divisors (see below), whose sum is σ = 1438238592. Its totient is φ = 438070080.

The previous prime is 846646621. The next prime is 846646657. The reversal of 846646647 is 746646648.

It is not a de Polignac number, because 846646647 - 2²⁴ = 829869431 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 846646647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (846646607) 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, 472888 + ... + 474674.

It is an arithmetic number, because the mean of its divisors is an integer number (29963304).

Almost surely, 2^846646647 is an apocalyptic number.

846646647 is a deficient number, since it is larger than the sum of its proper divisors (591591945).

846646647 is a wasteful number, since it uses less digits than its factorization.

846646647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2108 (or 2101 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 51.

The square root of 846646647 is about 29097.1931120512. The cubic root of 846646647 is about 946.0208994514.

Subtracting from 846646647 its reverse (746646648), we obtain a palindrome (99999999).

The spelling of 846646647 in words is "eight hundred forty-six million, six hundred forty-six thousand, six hundred forty-seven".