889613642961 has 20 divisors (see below), whose sum is σ = 1328989822644. Its totient is φ = 593048628000.

The previous prime is 889613642941. The next prime is 889613642963. The reversal of 889613642961 is 169246316988.

889613642961 is a `hidden beast` number, since 8 + 8 + 9 + 613 + 6 + 4 + 2 + 9 + 6 + 1 = 666.

889613642961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 869369760000 + 20243882961 = 932400^2 + 142281^2 .

It is not a de Polignac number, because 889613642961 - 2²³ = 889605254353 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (889613642963) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1615191 + ... + 2094771.

Almost surely, 2^889613642961 is an apocalyptic number.

889613642961 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

889613642961 is a deficient number, since it is larger than the sum of its proper divisors (439376179683).

889613642961 is a wasteful number, since it uses less digits than its factorization.

889613642961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502494 (or 502485 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 63.

The spelling of 889613642961 in words is "eight hundred eighty-nine billion, six hundred thirteen million, six hundred forty-two thousand, nine hundred sixty-one".