8655909961 has 4 divisors (see below), whose sum is σ = 8661012372. Its totient is φ = 8650807552.

The previous prime is 8655909923. The next prime is 8655910031. The reversal of 8655909961 is 1699095568.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5562325561 + 3093584400 = 74581^2 + 55620^2 .

It is a cyclic number.

It is not a de Polignac number, because 8655909961 - 2²³ = 8647521353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8655909896 and 8655909905.

It is not an unprimeable number, because it can be changed into a prime (8655909901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2548660 + ... + 2552053.

It is an arithmetic number, because the mean of its divisors is an integer number (2165253093).

Almost surely, 2^8655909961 is an apocalyptic number.

It is an amenable number.

8655909961 is a deficient number, since it is larger than the sum of its proper divisors (5102411).

8655909961 is a wasteful number, since it uses less digits than its factorization.

8655909961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5102410.

The product of its (nonzero) digits is 5248800, while the sum is 58.

The square root of 8655909961 is about 93037.1429107752. The cubic root of 8655909961 is about 2053.2298845573.

The spelling of 8655909961 in words is "eight billion, six hundred fifty-five million, nine hundred nine thousand, nine hundred sixty-one".