846438561 has 6 divisors (see below), whose sum is σ = 1222633490. Its totient is φ = 564292368.

The previous prime is 846438533. The next prime is 846438583. The reversal of 846438561 is 165834648.

846438561 is a `hidden beast` number, since 8 + 46 + 43 + 8 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 583512336 + 262926225 = 24156^2 + 16215^2 .

It is not a de Polignac number, because 846438561 - 2¹³ = 846430369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (846438511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 47024356 + ... + 47024373.

Almost surely, 2^846438561 is an apocalyptic number.

It is an amenable number.

846438561 is a deficient number, since it is larger than the sum of its proper divisors (376194929).

846438561 is a wasteful number, since it uses less digits than its factorization.

846438561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94048735 (or 94048732 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 846438561 is about 29093.6171865927. The cubic root of 846438561 is about 945.9433898098.

The spelling of 846438561 in words is "eight hundred forty-six million, four hundred thirty-eight thousand, five hundred sixty-one".