172055620205 has 16 divisors (see below), whose sum is σ = 236052284160. Its totient is φ = 117935851392.

The previous prime is 172055620153. The next prime is 172055620237. The reversal of 172055620205 is 502026550271.

It is a cyclic number.

It is not a de Polignac number, because 172055620205 - 2⁶ = 172055620141 is a prime.

It is a super-3 number, since 3×172055620205³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 847625 + ... + 1030814.

It is an arithmetic number, because the mean of its divisors is an integer number (14753267760).

Almost surely, 2^172055620205 is an apocalyptic number.

It is an amenable number.

172055620205 is a deficient number, since it is larger than the sum of its proper divisors (63996663955).

172055620205 is a wasteful number, since it uses less digits than its factorization.

172055620205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1881068.

The product of its (nonzero) digits is 42000, while the sum is 35.

The spelling of 172055620205 in words is "one hundred seventy-two billion, fifty-five million, six hundred twenty thousand, two hundred five".