72544461 has 24 divisors (see below), whose sum is σ = 110953920. Its totient is φ = 42049920.

The previous prime is 72544447. The next prime is 72544469. The reversal of 72544461 is 16444527.

It is not a de Polignac number, because 72544461 - 2⁵ = 72544429 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72544469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4005 + ... + 12693.

It is an arithmetic number, because the mean of its divisors is an integer number (4623080).

Almost surely, 2^72544461 is an apocalyptic number.

It is an amenable number.

72544461 is a deficient number, since it is larger than the sum of its proper divisors (38409459).

72544461 is a wasteful number, since it uses less digits than its factorization.

72544461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8737 (or 8726 counting only the distinct ones).

The product of its digits is 26880, while the sum is 33.

The square root of 72544461 is about 8517.3036226261. The cubic root of 72544461 is about 417.0627662308.

Adding to 72544461 its reverse (16444527), we get a palindrome (88988988).

The spelling of 72544461 in words is "seventy-two million, five hundred forty-four thousand, four hundred sixty-one".