78735838279 has 4 divisors (see below), whose sum is σ = 89983815184. Its totient is φ = 67487861376.

The previous prime is 78735838277. The next prime is 78735838289. The reversal of 78735838279 is 97283853787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97283853787 = 1487 ⋅65422901.

It is a cyclic number.

It is not a de Polignac number, because 78735838279 - 2¹ = 78735838277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78735838277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5623988442 + ... + 5623988455.

It is an arithmetic number, because the mean of its divisors is an integer number (22495953796).

Almost surely, 2^78735838279 is an apocalyptic number.

78735838279 is a deficient number, since it is larger than the sum of its proper divisors (11247976905).

78735838279 is a wasteful number, since it uses less digits than its factorization.

78735838279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11247976904.

The product of its digits is 142248960, while the sum is 67.

The spelling of 78735838279 in words is "seventy-eight billion, seven hundred thirty-five million, eight hundred thirty-eight thousand, two hundred seventy-nine".