985159861 has 16 divisors (see below), whose sum is σ = 1201858560. Its totient is φ = 788704560.

The previous prime is 985159831. The next prime is 985159873. The reversal of 985159861 is 168951589.

It is not a de Polignac number, because 985159861 - 2⁷ = 985159733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 985159799 and 985159808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985159831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42721 + ... + 61606.

It is an arithmetic number, because the mean of its divisors is an integer number (75116160).

Almost surely, 2^985159861 is an apocalyptic number.

It is an amenable number.

985159861 is a deficient number, since it is larger than the sum of its proper divisors (216698699).

985159861 is a wasteful number, since it uses less digits than its factorization.

985159861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104424.

The product of its digits is 777600, while the sum is 52.

The square root of 985159861 is about 31387.2563471228. The cubic root of 985159861 is about 995.0286132694.

The spelling of 985159861 in words is "nine hundred eighty-five million, one hundred fifty-nine thousand, eight hundred sixty-one".