172812119729 has 4 divisors (see below), whose sum is σ = 180325690176. Its totient is φ = 165298549284.

The previous prime is 172812119693. The next prime is 172812119881. The reversal of 172812119729 is 927911218271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172812119729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172812119329) 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, 3756785189 + ... + 3756785234.

It is an arithmetic number, because the mean of its divisors is an integer number (45081422544).

Almost surely, 2^172812119729 is an apocalyptic number.

It is an amenable number.

172812119729 is a deficient number, since it is larger than the sum of its proper divisors (7513570447).

172812119729 is an equidigital number, since it uses as much as digits as its factorization.

172812119729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7513570446.

The product of its digits is 254016, while the sum is 50.

The spelling of 172812119729 in words is "one hundred seventy-two billion, eight hundred twelve million, one hundred nineteen thousand, seven hundred twenty-nine".