72455543 has 12 divisors (see below), whose sum is σ = 78371160. Its totient is φ = 66901296.

The previous prime is 72455533. The next prime is 72455549. The reversal of 72455543 is 34555427.

It is not a de Polignac number, because 72455543 - 2¹⁶ = 72390007 is a prime.

It is a super-2 number, since 2×72455543² = 10499611422849698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72455549) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12980 + ... + 17702.

It is an arithmetic number, because the mean of its divisors is an integer number (6530930).

Almost surely, 2^72455543 is an apocalyptic number.

72455543 is a deficient number, since it is larger than the sum of its proper divisors (5915617).

72455543 is a wasteful number, since it uses less digits than its factorization.

72455543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4798 (or 4775 counting only the distinct ones).

The product of its digits is 84000, while the sum is 35.

The square root of 72455543 is about 8512.0821777048. The cubic root of 72455543 is about 416.8922981328.

The spelling of 72455543 in words is "seventy-two million, four hundred fifty-five thousand, five hundred forty-three".