72540011 has 8 divisors (see below), whose sum is σ = 74888880. Its totient is φ = 70221312.

The previous prime is 72540007. The next prime is 72540019. The reversal of 72540011 is 11004527.

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 72540011 - 2² = 72540007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72540019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2606 + ... + 12323.

It is an arithmetic number, because the mean of its divisors is an integer number (9361110).

Almost surely, 2^72540011 is an apocalyptic number.

72540011 is a deficient number, since it is larger than the sum of its proper divisors (2348869).

72540011 is a wasteful number, since it uses less digits than its factorization.

72540011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15085.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 72540011 is about 8517.0423857111. The cubic root of 72540011 is about 417.0542382778.

Adding to 72540011 its reverse (11004527), we get a palindrome (83544538).

The spelling of 72540011 in words is "seventy-two million, five hundred forty thousand, eleven".