79715882842 has 4 divisors (see below), whose sum is σ = 119573824266. Its totient is φ = 39857941420.

The previous prime is 79715882837. The next prime is 79715882861. The reversal of 79715882842 is 24828851797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24828851797 = 1993 ⋅12458029.

It can be written as a sum of positive squares in only one way, i.e., 79569690561 + 146192281 = 282081^2 + 12091^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19928970709 + ... + 19928970712.

Almost surely, 2^79715882842 is an apocalyptic number.

79715882842 is a deficient number, since it is larger than the sum of its proper divisors (39857941424).

79715882842 is a wasteful number, since it uses less digits than its factorization.

79715882842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39857941423.

The product of its digits is 18063360, while the sum is 61.

The spelling of 79715882842 in words is "seventy-nine billion, seven hundred fifteen million, eight hundred eighty-two thousand, eight hundred forty-two".