172133271605 has 32 divisors (see below), whose sum is σ = 220451795424. Its totient is φ = 128576987136.

The previous prime is 172133271539. The next prime is 172133271649. The reversal of 172133271605 is 506172331271.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 67370355364 + 104762916241 = 259558^2 + 323671^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172133271605 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8704409 + ... + 8724161.

It is an arithmetic number, because the mean of its divisors is an integer number (6889118607).

Almost surely, 2^172133271605 is an apocalyptic number.

It is an amenable number.

172133271605 is a deficient number, since it is larger than the sum of its proper divisors (48318523819).

172133271605 is a wasteful number, since it uses less digits than its factorization.

172133271605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20585.

The product of its (nonzero) digits is 52920, while the sum is 38.

The spelling of 172133271605 in words is "one hundred seventy-two billion, one hundred thirty-three million, two hundred seventy-one thousand, six hundred five".