8953658561 has 4 divisors (see below), whose sum is σ = 9076311492. Its totient is φ = 8831005632.

The previous prime is 8953658543. The next prime is 8953658599. The reversal of 8953658561 is 1658563598.

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 6455158336 + 2498500225 = 80344^2 + 49985^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8953658561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8953658497 and 8953658506.

It is not an unprimeable number, because it can be changed into a prime (8953658501) 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, 61326356 + ... + 61326501.

It is an arithmetic number, because the mean of its divisors is an integer number (2269077873).

Almost surely, 2^8953658561 is an apocalyptic number.

It is an amenable number.

8953658561 is a deficient number, since it is larger than the sum of its proper divisors (122652931).

8953658561 is a wasteful number, since it uses less digits than its factorization.

8953658561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122652930.

The product of its digits is 7776000, while the sum is 56.

The square root of 8953658561 is about 94623.7737622000. The cubic root of 8953658561 is about 2076.5075268134.

The spelling of 8953658561 in words is "eight billion, nine hundred fifty-three million, six hundred fifty-eight thousand, five hundred sixty-one".