72000445571 has 4 divisors (see below), whose sum is σ = 72266130144. Its totient is φ = 71734761000.

The previous prime is 72000445549. The next prime is 72000445597. The reversal of 72000445571 is 17554400027.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72000445571 - 2¹⁰ = 72000444547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72000445511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132841880 + ... + 132842421.

It is an arithmetic number, because the mean of its divisors is an integer number (18066532536).

Almost surely, 2^72000445571 is an apocalyptic number.

72000445571 is a deficient number, since it is larger than the sum of its proper divisors (265684573).

72000445571 is a wasteful number, since it uses less digits than its factorization.

72000445571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265684572.

The product of its (nonzero) digits is 39200, while the sum is 35.

Adding to 72000445571 its reverse (17554400027), we get a palindrome (89554845598).

The spelling of 72000445571 in words is "seventy-two billion, four hundred forty-five thousand, five hundred seventy-one".