712728121171 has 24 divisors (see below), whose sum is σ = 791379447264. Its totient is φ = 641348400000.

The previous prime is 712728121159. The next prime is 712728121199. The reversal of 712728121171 is 171121827217.

It is not a de Polignac number, because 712728121171 - 2¹³ = 712728112979 is a prime.

It is a super-2 number, since 2×712728121171² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (712722121171) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77122111 + ... + 77131351.

It is an arithmetic number, because the mean of its divisors is an integer number (32974143636).

Almost surely, 2^712728121171 is an apocalyptic number.

712728121171 is a deficient number, since it is larger than the sum of its proper divisors (78651326093).

712728121171 is a wasteful number, since it uses less digits than its factorization.

712728121171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15675 (or 15664 counting only the distinct ones).

The product of its digits is 21952, while the sum is 40.

Adding to 712728121171 its reverse (171121827217), we get a palindrome (883849948388).

The spelling of 712728121171 in words is "seven hundred twelve billion, seven hundred twenty-eight million, one hundred twenty-one thousand, one hundred seventy-one".