78715715158 has 8 divisors (see below), whose sum is σ = 121882397760. Its totient is φ = 38088249240.

The previous prime is 78715715153. The next prime is 78715715159. The reversal of 78715715158 is 85151751787.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 78715715099 and 78715715108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78715715153) 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, 634804093 + ... + 634804216.

It is an arithmetic number, because the mean of its divisors is an integer number (15235299720).

Almost surely, 2^78715715158 is an apocalyptic number.

78715715158 is a deficient number, since it is larger than the sum of its proper divisors (43166682602).

78715715158 is a wasteful number, since it uses less digits than its factorization.

78715715158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269608342.

The product of its digits is 2744000, while the sum is 55.

The spelling of 78715715158 in words is "seventy-eight billion, seven hundred fifteen million, seven hundred fifteen thousand, one hundred fifty-eight".