172621424126271 has 32 divisors (see below), whose sum is σ = 243731812262400. Its totient is φ = 108368827983360.

The previous prime is 172621424126237. The next prime is 172621424126273.

It is a happy number.

172621424126271 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 172621424126271 - 2¹³ = 172621424118079 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172621424126271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172621424126273) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 495965835 + ... + 496313763.

It is an arithmetic number, because the mean of its divisors is an integer number (7616619133200).

Almost surely, 2^{172621424126271} is an apocalyptic number.

172621424126271 is a deficient number, since it is larger than the sum of its proper divisors (71110388136129).

172621424126271 is a wasteful number, since it uses less digits than its factorization.

172621424126271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400239.

The product of its digits is 903168, while the sum is 48.

The spelling of 172621424126271 in words is "one hundred seventy-two trillion, six hundred twenty-one billion, four hundred twenty-four million, one hundred twenty-six thousand, two hundred seventy-one".