84561644 has 12 divisors (see below), whose sum is σ = 149448768. Its totient is φ = 41862000.

The previous prime is 84561643. The next prime is 84561671. The reversal of 84561644 is 44616548.

It is a super-3 number, since 3×84561644³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 84561598 and 84561607.

It is not an unprimeable number, because it can be changed into a prime (84561641) 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 3 ways as a sum of consecutive naturals, for example, 104252 + ... + 105059.

It is an arithmetic number, because the mean of its divisors is an integer number (12454064).

Almost surely, 2^84561644 is an apocalyptic number.

It is an amenable number.

84561644 is a deficient number, since it is larger than the sum of its proper divisors (64887124).

84561644 is a wasteful number, since it uses less digits than its factorization.

84561644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209416 (or 209414 counting only the distinct ones).

The product of its digits is 92160, while the sum is 38.

The square root of 84561644 is about 9195.7405357046. The cubic root of 84561644 is about 438.9258301818.

The spelling of 84561644 in words is "eighty-four million, five hundred sixty-one thousand, six hundred forty-four".