172346506321 has 8 divisors (see below), whose sum is σ = 192014676864. Its totient is φ = 153345053520.

The previous prime is 172346506313. The next prime is 172346506327. The reversal of 172346506321 is 123605643271.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172346506321 - 2³ = 172346506313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172346506327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166678890 + ... + 166679923.

It is an arithmetic number, because the mean of its divisors is an integer number (24001834608).

Almost surely, 2^172346506321 is an apocalyptic number.

172346506321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

172346506321 is a deficient number, since it is larger than the sum of its proper divisors (19668170543).

172346506321 is a wasteful number, since it uses less digits than its factorization.

172346506321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333358871.

The product of its (nonzero) digits is 181440, while the sum is 40.

The spelling of 172346506321 in words is "one hundred seventy-two billion, three hundred forty-six million, five hundred six thousand, three hundred twenty-one".