7968179638 has 16 divisors (see below), whose sum is σ = 12028962816. Its totient is φ = 3958574760.

The previous prime is 7968179621. The next prime is 7968179641. The reversal of 7968179638 is 8369718697.

It is a super-2 number, since 2×7968179638² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7968179638.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325495 + ... + 349117.

It is an arithmetic number, because the mean of its divisors is an integer number (751810176).

Almost surely, 2^7968179638 is an apocalyptic number.

7968179638 is a deficient number, since it is larger than the sum of its proper divisors (4060783178).

7968179638 is a wasteful number, since it uses less digits than its factorization.

7968179638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24699.

The product of its digits is 27433728, while the sum is 64.

The square root of 7968179638 is about 89264.6606334220. The cubic root of 7968179638 is about 1997.3447796290.

The spelling of 7968179638 in words is "seven billion, nine hundred sixty-eight million, one hundred seventy-nine thousand, six hundred thirty-eight".