72586205518 has 4 divisors (see below), whose sum is σ = 108879308280. Its totient is φ = 36293102758.

The previous prime is 72586205501. The next prime is 72586205539. The reversal of 72586205518 is 81550268527.

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

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18146551378 + ... + 18146551381.

It is an arithmetic number, because the mean of its divisors is an integer number (27219827070).

Almost surely, 2^72586205518 is an apocalyptic number.

72586205518 is a deficient number, since it is larger than the sum of its proper divisors (36293102762).

72586205518 is a wasteful number, since it uses less digits than its factorization.

72586205518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36293102761.

The product of its (nonzero) digits is 1344000, while the sum is 49.

The spelling of 72586205518 in words is "seventy-two billion, five hundred eighty-six million, two hundred five thousand, five hundred eighteen".