172128594693 has 8 divisors (see below), whose sum is σ = 250368865056. Its totient is φ = 104320360400.

The previous prime is 172128594647. The next prime is 172128594749. The reversal of 172128594693 is 396495821271.

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 172128594693 - 2²⁵ = 172095040261 is a prime.

It is a super-2 number, since 2×172128594693² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172128594493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2608008978 + ... + 2608009043.

It is an arithmetic number, because the mean of its divisors is an integer number (31296108132).

Almost surely, 2^172128594693 is an apocalyptic number.

It is an amenable number.

172128594693 is a deficient number, since it is larger than the sum of its proper divisors (78240270363).

172128594693 is a wasteful number, since it uses less digits than its factorization.

172128594693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5216018035.

The product of its digits is 6531840, while the sum is 57.

The spelling of 172128594693 in words is "one hundred seventy-two billion, one hundred twenty-eight million, five hundred ninety-four thousand, six hundred ninety-three".