84885561 has 24 divisors (see below), whose sum is σ = 124697664. Its totient is φ = 55637280.

The previous prime is 84885547. The next prime is 84885589. The reversal of 84885561 is 16558848.

84885561 is a `hidden beast` number, since 8 + 4 + 8 + 85 + 561 = 666.

It is not a de Polignac number, because 84885561 - 2⁶ = 84885497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (84880561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 174060 + ... + 174546.

It is an arithmetic number, because the mean of its divisors is an integer number (5195736).

Almost surely, 2^84885561 is an apocalyptic number.

It is an amenable number.

84885561 is a deficient number, since it is larger than the sum of its proper divisors (39812103).

84885561 is a wasteful number, since it uses less digits than its factorization.

84885561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781 (or 778 counting only the distinct ones).

The product of its digits is 307200, while the sum is 45.

The square root of 84885561 is about 9213.3360407618. The cubic root of 84885561 is about 439.4855575012.

The spelling of 84885561 in words is "eighty-four million, eight hundred eighty-five thousand, five hundred sixty-one".