7767113138 has 16 divisors (see below), whose sum is σ = 11681423640. Its totient is φ = 3873319296.

The previous prime is 7767113131. The next prime is 7767113161. The reversal of 7767113138 is 8313117677.

It can be written as a sum of positive squares in 4 ways, for example, as 3487729249 + 4279383889 = 59057^2 + 65417^2 .

It is not an unprimeable number, because it can be changed into a prime (7767113131) 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, 1494248 + ... + 1499436.

Almost surely, 2^7767113138 is an apocalyptic number.

7767113138 is a deficient number, since it is larger than the sum of its proper divisors (3914310502).

7767113138 is a wasteful number, since it uses less digits than its factorization.

7767113138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7021.

The product of its digits is 148176, while the sum is 44.

The square root of 7767113138 is about 88131.2268041243. The cubic root of 7767113138 is about 1980.4013349982.

It can be divided in two parts, 77671 and 13138, that added together give a palindrome (90809).

The spelling of 7767113138 in words is "seven billion, seven hundred sixty-seven million, one hundred thirteen thousand, one hundred thirty-eight".