72519172818 has 8 divisors (see below), whose sum is σ = 145038345648. Its totient is φ = 24173057604.

The previous prime is 72519172801. The next prime is 72519172823. The reversal of 72519172818 is 81827191527.

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

72519172818 is an admirable number.

It is a super-2 number, since 2×72519172818² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6043264396 + ... + 6043264407.

It is an arithmetic number, because the mean of its divisors is an integer number (18129793206).

Almost surely, 2^72519172818 is an apocalyptic number.

72519172818 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72519172818 is a wasteful number, since it uses less digits than its factorization.

72519172818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12086528808.

The product of its digits is 564480, while the sum is 51.

The spelling of 72519172818 in words is "seventy-two billion, five hundred nineteen million, one hundred seventy-two thousand, eight hundred eighteen".