8177804138 has 12 divisors (see below), whose sum is σ = 14269433922. Its totient is φ = 3504773160.

The previous prime is 8177804111. The next prime is 8177804153. The reversal of 8177804138 is 8314087718.

It can be written as a sum of positive squares in only one way, i.e., 8102340169 + 75463969 = 90013^2 + 8687^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8177804092 and 8177804101.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41723393 + ... + 41723588.

Almost surely, 2^8177804138 is an apocalyptic number.

8177804138 is a deficient number, since it is larger than the sum of its proper divisors (6091629784).

8177804138 is a wasteful number, since it uses less digits than its factorization.

8177804138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83446997 (or 83446990 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 47.

The square root of 8177804138 is about 90431.2121891551. The cubic root of 8177804138 is about 2014.7085752335.

The spelling of 8177804138 in words is "eight billion, one hundred seventy-seven million, eight hundred four thousand, one hundred thirty-eight".