72418317587 has 16 divisors (see below), whose sum is σ = 90389647872. Its totient is φ = 56366185920.

The previous prime is 72418317541. The next prime is 72418317593. The reversal of 72418317587 is 78571381427.

It is a happy number.

It is not a de Polignac number, because 72418317587 - 2⁸ = 72418317331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72418317487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 461858 + ... + 598455.

It is an arithmetic number, because the mean of its divisors is an integer number (5649352992).

Almost surely, 2^72418317587 is an apocalyptic number.

72418317587 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

72418317587 is a deficient number, since it is larger than the sum of its proper divisors (17971330285).

72418317587 is a wasteful number, since it uses less digits than its factorization.

72418317587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061218.

The product of its digits is 2634240, while the sum is 53.

The spelling of 72418317587 in words is "seventy-two billion, four hundred eighteen million, three hundred seventeen thousand, five hundred eighty-seven".