985663161 has 48 divisors (see below), whose sum is σ = 1699152000. Its totient is φ = 559312128.

The previous prime is 985663153. The next prime is 985663177. The reversal of 985663161 is 161366589.

985663161 is a `hidden beast` number, since 9 + 8 + 5 + 6 + 631 + 6 + 1 = 666.

It is not a de Polignac number, because 985663161 - 2³ = 985663153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (985663121) 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 47 ways as a sum of consecutive naturals, for example, 251505 + ... + 255393.

It is an arithmetic number, because the mean of its divisors is an integer number (35399000).

Almost surely, 2^985663161 is an apocalyptic number.

It is an amenable number.

985663161 is a deficient number, since it is larger than the sum of its proper divisors (713488839).

985663161 is a wasteful number, since it uses less digits than its factorization.

985663161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4060 (or 4048 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 985663161 is about 31395.2729085128. The cubic root of 985663161 is about 995.1980316763.

The spelling of 985663161 in words is "nine hundred eighty-five million, six hundred sixty-three thousand, one hundred sixty-one".