9671442561 has 24 divisors (see below), whose sum is σ = 15255695520. Its totient is φ = 5855385600.

The previous prime is 9671442553. The next prime is 9671442581. The reversal of 9671442561 is 1652441769.

9671442561 is a `hidden beast` number, since 96 + 71 + 442 + 56 + 1 = 666.

It is not a de Polignac number, because 9671442561 - 2³ = 9671442553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9671442581) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45825 + ... + 146433.

It is an arithmetic number, because the mean of its divisors is an integer number (635653980).

Almost surely, 2^9671442561 is an apocalyptic number.

It is an amenable number.

9671442561 is a deficient number, since it is larger than the sum of its proper divisors (5584252959).

9671442561 is a wasteful number, since it uses less digits than its factorization.

9671442561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101597 (or 101594 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 9671442561 is about 98343.4927232097. The cubic root of 9671442561 is about 2130.5762700502.

The spelling of 9671442561 in words is "nine billion, six hundred seventy-one million, four hundred forty-two thousand, five hundred sixty-one".