72081611 has 8 divisors (see below), whose sum is σ = 86714880. Its totient is φ = 58532328.

The previous prime is 72081593. The next prime is 72081613. The reversal of 72081611 is 11618027.

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

It is a cyclic number.

It is not a de Polignac number, because 72081611 - 2¹⁰ = 72080587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72081613) 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, 270851 + ... + 271116.

It is an arithmetic number, because the mean of its divisors is an integer number (10839360).

Almost surely, 2^72081611 is an apocalyptic number.

72081611 is a deficient number, since it is larger than the sum of its proper divisors (14633269).

72081611 is a wasteful number, since it uses less digits than its factorization.

72081611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541993.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 72081611 is about 8490.0889865772. The cubic root of 72081611 is about 416.1738883344.

Adding to 72081611 its reverse (11618027), we get a palindrome (83699638).

The spelling of 72081611 in words is "seventy-two million, eighty-one thousand, six hundred eleven".