7638888968 has 16 divisors (see below), whose sum is σ = 14557719660. Its totient is φ = 3756830400.

The previous prime is 7638888947. The next prime is 7638888973. The reversal of 7638888968 is 8698888367.

It can be written as a sum of positive squares in 2 ways, for example, as 7143292324 + 495596644 = 84518^2 + 22262^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7826243 + ... + 7827218.

Almost surely, 2^7638888968 is an apocalyptic number.

It is an amenable number.

7638888968 is a deficient number, since it is larger than the sum of its proper divisors (6918830692).

7638888968 is a wasteful number, since it uses less digits than its factorization.

7638888968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15653528 (or 15653524 counting only the distinct ones).

The product of its digits is 222953472, while the sum is 71.

The square root of 7638888968 is about 87400.7378000895. The cubic root of 7638888968 is about 1969.4429242446.

The spelling of 7638888968 in words is "seven billion, six hundred thirty-eight million, eight hundred eighty-eight thousand, nine hundred sixty-eight".