8607089777561 has 8 divisors (see below), whose sum is σ = 9389595833184. Its totient is φ = 7824590946720.

The previous prime is 8607089777537. The next prime is 8607089777581. The reversal of 8607089777561 is 1657779807068.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8607089777561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8607089777501) 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, 855290 + ... + 4236236.

It is an arithmetic number, because the mean of its divisors is an integer number (1173699479148).

Almost surely, 2^{8607089777561} is an apocalyptic number.

It is an amenable number.

8607089777561 is a deficient number, since it is larger than the sum of its proper divisors (782506055623).

8607089777561 is a wasteful number, since it uses less digits than its factorization.

8607089777561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3612391.

The product of its (nonzero) digits is 248935680, while the sum is 71.

The spelling of 8607089777561 in words is "eight trillion, six hundred seven billion, eighty-nine million, seven hundred seventy-seven thousand, five hundred sixty-one".