172872433543 has 4 divisors (see below), whose sum is σ = 183041400240. Its totient is φ = 162703466848.

The previous prime is 172872433529. The next prime is 172872433619. The reversal of 172872433543 is 345334278271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345334278271 = 397 ⋅869859643.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172872433543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172872433843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5084483323 + ... + 5084483356.

It is an arithmetic number, because the mean of its divisors is an integer number (45760350060).

Almost surely, 2^172872433543 is an apocalyptic number.

172872433543 is a deficient number, since it is larger than the sum of its proper divisors (10168966697).

172872433543 is a wasteful number, since it uses less digits than its factorization.

172872433543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10168966696.

The product of its digits is 3386880, while the sum is 49.

The spelling of 172872433543 in words is "one hundred seventy-two billion, eight hundred seventy-two million, four hundred thirty-three thousand, five hundred forty-three".