8118788957 has 4 divisors (see below), whose sum is σ = 8596364796. Its totient is φ = 7641213120.

The previous prime is 8118788933. The next prime is 8118788959. The reversal of 8118788957 is 7598878118.

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 2272810276 + 5845978681 = 47674^2 + 76459^2 .

It is a cyclic number.

It is not a de Polignac number, because 8118788957 - 2⁶ = 8118788893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8118788957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8118788959) 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, 238787894 + ... + 238787927.

It is an arithmetic number, because the mean of its divisors is an integer number (2149091199).

Almost surely, 2^8118788957 is an apocalyptic number.

It is an amenable number.

8118788957 is a deficient number, since it is larger than the sum of its proper divisors (477575839).

8118788957 is a wasteful number, since it uses less digits than its factorization.

8118788957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477575838.

The product of its digits is 9031680, while the sum is 62.

The square root of 8118788957 is about 90104.3226321579. The cubic root of 8118788957 is about 2009.8504840806.

The spelling of 8118788957 in words is "eight billion, one hundred eighteen million, seven hundred eighty-eight thousand, nine hundred fifty-seven".