79012042438 has 24 divisors (see below), whose sum is σ = 137936314152. Its totient is φ = 33845513184.

The previous prime is 79012042433. The next prime is 79012042441. The reversal of 79012042438 is 83424021097.

It is a self number, because there is not a number n which added to its sum of digits gives 79012042438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79012042433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 231 + ... + 397522.

It is an arithmetic number, because the mean of its divisors is an integer number (5747346423).

Almost surely, 2^79012042438 is an apocalyptic number.

79012042438 is a deficient number, since it is larger than the sum of its proper divisors (58924271714).

79012042438 is a wasteful number, since it uses less digits than its factorization.

79012042438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399796 (or 399789 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The spelling of 79012042438 in words is "seventy-nine billion, twelve million, forty-two thousand, four hundred thirty-eight".