79784138798 has 32 divisors (see below), whose sum is σ = 147419973120. Its totient is φ = 31535917920.

The previous prime is 79784138699. The next prime is 79784138803. The reversal of 79784138798 is 89783148797.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25943 + ... + 400301.

It is an arithmetic number, because the mean of its divisors is an integer number (4606874160).

Almost surely, 2^79784138798 is an apocalyptic number.

79784138798 is a deficient number, since it is larger than the sum of its proper divisors (67635834322).

79784138798 is a wasteful number, since it uses less digits than its factorization.

79784138798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375552.

The product of its digits is 170698752, while the sum is 71.

Subtracting 79784138798 from its reverse (89783148797), we obtain a palindrome (9999009999).

The spelling of 79784138798 in words is "seventy-nine billion, seven hundred eighty-four million, one hundred thirty-eight thousand, seven hundred ninety-eight".