9961654589 has 8 divisors (see below), whose sum is σ = 9976366680. Its totient is φ = 9946956096.

The previous prime is 9961654531. The next prime is 9961654597. The reversal of 9961654589 is 9854561699.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4916393689 + 5045260900 = 70117^2 + 71030^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9961654589 - 2⁸ = 9961654333 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9961654519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3278579 + ... + 3281615.

It is an arithmetic number, because the mean of its divisors is an integer number (1247045835).

Almost surely, 2^9961654589 is an apocalyptic number.

It is an amenable number.

9961654589 is a deficient number, since it is larger than the sum of its proper divisors (14712091).

9961654589 is a wasteful number, since it uses less digits than its factorization.

With its successor (9961654590) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (6799).

9961654589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6799.

The product of its digits is 20995200, while the sum is 62.

The square root of 9961654589 is about 99808.0887954478. The cubic root of 9961654589 is about 2151.6774065954.

The spelling of 9961654589 in words is "nine billion, nine hundred sixty-one million, six hundred fifty-four thousand, five hundred eighty-nine".