79238638694 has 4 divisors (see below), whose sum is σ = 118857958044. Its totient is φ = 39619319346.

The previous prime is 79238638693. The next prime is 79238638709. The reversal of 79238638694 is 49683683297.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49683683297 = 16811 ⋅2955427.

It is a self number, because there is not a number n which added to its sum of digits gives 79238638694.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79238638693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19809659672 + ... + 19809659675.

It is an arithmetic number, because the mean of its divisors is an integer number (29714489511).

Almost surely, 2^79238638694 is an apocalyptic number.

79238638694 is a deficient number, since it is larger than the sum of its proper divisors (39619319350).

79238638694 is a wasteful number, since it uses less digits than its factorization.

79238638694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39619319349.

The product of its digits is 94058496, while the sum is 65.

The spelling of 79238638694 in words is "seventy-nine billion, two hundred thirty-eight million, six hundred thirty-eight thousand, six hundred ninety-four".