72185311558818 has 32 divisors (see below), whose sum is σ = 165943244966400. Its totient is φ = 23232054294288.

The previous prime is 72185311558817. The next prime is 72185311558931. The reversal of 72185311558818 is 81885511358127.

It is a happy number.

72185311558818 is a `hidden beast` number, since 7 + 2 + 1 + 8 + 5 + 31 + 1 + 5 + 588 + 18 = 666.

It is not an unprimeable number, because it can be changed into a prime (72185311558817) 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, 23047671346 + ... + 23047674477.

It is an arithmetic number, because the mean of its divisors is an integer number (5185726405200).

Almost surely, 2^{72185311558818} is an apocalyptic number.

72185311558818 is an abundant number, since it is smaller than the sum of its proper divisors (93757933407582).

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

72185311558818 is a wasteful number, since it uses less digits than its factorization.

72185311558818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46095345863 (or 46095345857 counting only the distinct ones).

The product of its digits is 21504000, while the sum is 63.

The spelling of 72185311558818 in words is "seventy-two trillion, one hundred eighty-five billion, three hundred eleven million, five hundred fifty-eight thousand, eight hundred eighteen".