172873144431 has 96 divisors (see below), whose sum is σ = 294050615040. Its totient is φ = 100612917504.

The previous prime is 172873144417. The next prime is 172873144447. The reversal of 172873144431 is 134441378271.

172873144431 is a `hidden beast` number, since 1 + 7 + 2 + 8 + 73 + 144 + 431 = 666.

It is not a de Polignac number, because 172873144431 - 2¹³ = 172873136239 is a prime.

It is a super-2 number, since 2×172873144431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172873144471) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 40992235 + ... + 40996451.

It is an arithmetic number, because the mean of its divisors is an integer number (3063027240).

Almost surely, 2^172873144431 is an apocalyptic number.

172873144431 is a deficient number, since it is larger than the sum of its proper divisors (121177470609).

172873144431 is a wasteful number, since it uses less digits than its factorization.

172873144431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4947 (or 4935 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The spelling of 172873144431 in words is "one hundred seventy-two billion, eight hundred seventy-three million, one hundred forty-four thousand, four hundred thirty-one".