78719159813 has 4 divisors (see below), whose sum is σ = 89964754080. Its totient is φ = 67473565548.

The previous prime is 78719159809. The next prime is 78719159833. The reversal of 78719159813 is 31895191787.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78719159813 - 2² = 78719159809 is a prime.

It is a super-2 number, since 2×78719159813² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78719159803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5622797123 + ... + 5622797136.

It is an arithmetic number, because the mean of its divisors is an integer number (22491188520).

Almost surely, 2^78719159813 is an apocalyptic number.

It is an amenable number.

78719159813 is a deficient number, since it is larger than the sum of its proper divisors (11245594267).

78719159813 is a wasteful number, since it uses less digits than its factorization.

78719159813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11245594266.

The product of its digits is 3810240, while the sum is 59.

The spelling of 78719159813 in words is "seventy-eight billion, seven hundred nineteen million, one hundred fifty-nine thousand, eight hundred thirteen".