8113685777 has 8 divisors (see below), whose sum is σ = 8198911464. Its totient is φ = 8028695808.

The previous prime is 8113685771. The next prime is 8113685807. The reversal of 8113685777 is 7775863118.

It is a Cunningham number, because it is equal to 90076²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 26460736 + 8087225041 = 5144^2 + 89929^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 8113685777 - 2³² = 3818718481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8113685771) 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, 10703 + ... + 127835.

It is an arithmetic number, because the mean of its divisors is an integer number (1024863933).

Almost surely, 2^8113685777 is an apocalyptic number.

It is an amenable number.

8113685777 is a deficient number, since it is larger than the sum of its proper divisors (85225687).

8113685777 is a wasteful number, since it uses less digits than its factorization.

8113685777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117859.

The product of its digits is 1975680, while the sum is 53.

The square root of 8113685777 is about 90076.0000055509. Note that the first 5 decimals coincide. The cubic root of 8113685777 is about 2009.4292891388.

The spelling of 8113685777 in words is "eight billion, one hundred thirteen million, six hundred eighty-five thousand, seven hundred seventy-seven".