79585171478 has 4 divisors (see below), whose sum is σ = 119377757220. Its totient is φ = 39792585738.

The previous prime is 79585171469. The next prime is 79585171529. The reversal of 79585171478 is 87417158597.

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

It is a self number, because there is not a number n which added to its sum of digits gives 79585171478.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19896292868 + ... + 19896292871.

It is an arithmetic number, because the mean of its divisors is an integer number (29844439305).

Almost surely, 2^79585171478 is an apocalyptic number.

79585171478 is a deficient number, since it is larger than the sum of its proper divisors (39792585742).

79585171478 is a wasteful number, since it uses less digits than its factorization.

79585171478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39792585741.

The product of its digits is 19756800, while the sum is 62.

The spelling of 79585171478 in words is "seventy-nine billion, five hundred eighty-five million, one hundred seventy-one thousand, four hundred seventy-eight".