172243681533 has 24 divisors (see below), whose sum is σ = 310187756736. Its totient is φ = 89477236800.

The previous prime is 172243681481. The next prime is 172243681549. The reversal of 172243681533 is 335186342271.

172243681533 is a `hidden beast` number, since 1 + 7 + 2 + 2 + 4 + 36 + 81 + 533 = 666.

It is not a de Polignac number, because 172243681533 - 2⁹ = 172243681021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172243681333) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124273248 + ... + 124274633.

It is an arithmetic number, because the mean of its divisors is an integer number (12924489864).

Almost surely, 2^172243681533 is an apocalyptic number.

It is an amenable number.

172243681533 is a deficient number, since it is larger than the sum of its proper divisors (137944075203).

172243681533 is a wasteful number, since it uses less digits than its factorization.

172243681533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248547905 (or 248547902 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

It can be divided in two parts, 172243 and 681533, that added together give a square (853776 = 924²).

The spelling of 172243681533 in words is "one hundred seventy-two billion, two hundred forty-three million, six hundred eighty-one thousand, five hundred thirty-three".