79851340173 has 128 divisors (see below), whose sum is σ = 127957598208. Its totient is φ = 43817760000.

The previous prime is 79851340171. The next prime is 79851340187. The reversal of 79851340173 is 37104315897.

It is not a de Polignac number, because 79851340173 - 2¹ = 79851340171 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79851340171) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 115558758 + ... + 115559448.

It is an arithmetic number, because the mean of its divisors is an integer number (999668736).

Almost surely, 2^79851340173 is an apocalyptic number.

It is an amenable number.

79851340173 is a deficient number, since it is larger than the sum of its proper divisors (48106258035).

79851340173 is a wasteful number, since it uses less digits than its factorization.

79851340173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887.

The product of its (nonzero) digits is 635040, while the sum is 48.

It can be divided in two parts, 79851 and 340173, that added together give a palindrome (420024).

The spelling of 79851340173 in words is "seventy-nine billion, eight hundred fifty-one million, three hundred forty thousand, one hundred seventy-three".