11685642677 has 4 divisors (see below), whose sum is σ = 11727228876. Its totient is φ = 11644056480.

The previous prime is 11685642673. The next prime is 11685642721. The reversal of 11685642677 is 77624658611.

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 9759661681 + 1925980996 = 98791^2 + 43886^2 .

It is a cyclic number.

It is not a de Polignac number, because 11685642677 - 2² = 11685642673 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11685642673) 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, 20792678 + ... + 20793239.

It is an arithmetic number, because the mean of its divisors is an integer number (2931807219).

Almost surely, 2^11685642677 is an apocalyptic number.

It is an amenable number.

11685642677 is a deficient number, since it is larger than the sum of its proper divisors (41586199).

11685642677 is an equidigital number, since it uses as much as digits as its factorization.

11685642677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41586198.

The product of its digits is 3386880, while the sum is 53.

The spelling of 11685642677 in words is "eleven billion, six hundred eighty-five million, six hundred forty-two thousand, six hundred seventy-seven".