78424125959 has 4 divisors (see below), whose sum is σ = 78722316816. Its totient is φ = 78125935104.

The previous prime is 78424125911. The next prime is 78424125971. The reversal of 78424125959 is 95952142487.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78424125959 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 (78424125259) 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, 149095034 + ... + 149095559.

It is an arithmetic number, because the mean of its divisors is an integer number (19680579204).

Almost surely, 2^78424125959 is an apocalyptic number.

78424125959 is a deficient number, since it is larger than the sum of its proper divisors (298190857).

78424125959 is a wasteful number, since it uses less digits than its factorization.

78424125959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298190856.

The product of its digits is 7257600, while the sum is 56.

The spelling of 78424125959 in words is "seventy-eight billion, four hundred twenty-four million, one hundred twenty-five thousand, nine hundred fifty-nine".