8561540611 has 4 divisors (see below), whose sum is σ = 9220120672. Its totient is φ = 7902960552.

The previous prime is 8561540567. The next prime is 8561540623. The reversal of 8561540611 is 1160451658.

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

It is a cyclic number.

It is not a de Polignac number, because 8561540611 - 2²⁵ = 8527986179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8561540651) 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, 329290011 + ... + 329290036.

It is an arithmetic number, because the mean of its divisors is an integer number (2305030168).

Almost surely, 2^8561540611 is an apocalyptic number.

8561540611 is a deficient number, since it is larger than the sum of its proper divisors (658580061).

8561540611 is a wasteful number, since it uses less digits than its factorization.

8561540611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658580060.

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 8561540611 is about 92528.5934779082. The cubic root of 8561540611 is about 2045.7409582169.

The spelling of 8561540611 in words is "eight billion, five hundred sixty-one million, five hundred forty thousand, six hundred eleven".