72144537 has 8 divisors (see below), whose sum is σ = 100375104. Its totient is φ = 46005168.

The previous prime is 72144529. The next prime is 72144563. The reversal of 72144537 is 73544127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72144537 - 2³ = 72144529 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 72144498 and 72144507.

It is not an unprimeable number, because it can be changed into a prime (72144587) 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 7 ways as a sum of consecutive naturals, for example, 522718 + ... + 522855.

It is an arithmetic number, because the mean of its divisors is an integer number (12546888).

Almost surely, 2^72144537 is an apocalyptic number.

It is an amenable number.

72144537 is a deficient number, since it is larger than the sum of its proper divisors (28230567).

72144537 is a wasteful number, since it uses less digits than its factorization.

72144537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045599.

The product of its digits is 23520, while the sum is 33.

The square root of 72144537 is about 8493.7940285835. The cubic root of 72144537 is about 416.2949573136.

The spelling of 72144537 in words is "seventy-two million, one hundred forty-four thousand, five hundred thirty-seven".