172605344845 has 8 divisors (see below), whose sum is σ = 210043687680. Its totient is φ = 136139426640.

The previous prime is 172605344839. The next prime is 172605344861. The reversal of 172605344845 is 548443506271.

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

It is a de Polignac number, because none of the positive numbers 2^k-172605344845 is a prime.

It is a super-2 number, since 2×172605344845² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243105765 + ... + 243106474.

It is an arithmetic number, because the mean of its divisors is an integer number (26255460960).

Almost surely, 2^172605344845 is an apocalyptic number.

It is an amenable number.

172605344845 is a deficient number, since it is larger than the sum of its proper divisors (37438342835).

172605344845 is an equidigital number, since it uses as much as digits as its factorization.

172605344845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486212315.

The product of its (nonzero) digits is 3225600, while the sum is 49.

The spelling of 172605344845 in words is "one hundred seventy-two billion, six hundred five million, three hundred forty-four thousand, eight hundred forty-five".