79181688838 has 8 divisors (see below), whose sum is σ = 135740038032. Its totient is φ = 33935009496.

The previous prime is 79181688821. The next prime is 79181688869. The reversal of 79181688838 is 83888618197.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 2827917445 + ... + 2827917472.

It is an arithmetic number, because the mean of its divisors is an integer number (16967504754).

Almost surely, 2^79181688838 is an apocalyptic number.

79181688838 is a deficient number, since it is larger than the sum of its proper divisors (56558349194).

79181688838 is a wasteful number, since it uses less digits than its factorization.

79181688838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5655834926.

The product of its digits is 37158912, while the sum is 67.

The spelling of 79181688838 in words is "seventy-nine billion, one hundred eighty-one million, six hundred eighty-eight thousand, eight hundred thirty-eight".