72640011 has 4 divisors (see below), whose sum is σ = 96853352. Its totient is φ = 48426672.

The previous prime is 72639979. The next prime is 72640019. The reversal of 72640011 is 11004627.

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

It is not a de Polignac number, because 72640011 - 2⁵ = 72639979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72640011.

It is not an unprimeable number, because it can be changed into a prime (72640019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12106666 + ... + 12106671.

It is an arithmetic number, because the mean of its divisors is an integer number (24213338).

Almost surely, 2^72640011 is an apocalyptic number.

72640011 is a deficient number, since it is larger than the sum of its proper divisors (24213341).

72640011 is a wasteful number, since it uses less digits than its factorization.

72640011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24213340.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 72640011 is about 8522.9109463845. The cubic root of 72640011 is about 417.2457935937.

Adding to 72640011 its reverse (11004627), we get a palindrome (83644638).

The spelling of 72640011 in words is "seventy-two million, six hundred forty thousand, eleven".