72594978722 has 54 divisors (see below), whose sum is σ = 134644463091. Its totient is φ = 29263718400.

The previous prime is 72594978721. The next prime is 72594978727. The reversal of 72594978722 is 22787949527.

It can be written as a sum of positive squares in 5 ways, for example, as 68308526881 + 4286451841 = 261359^2 + 65471^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=190519.

It is a super-3 number, since 3×72594978722³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72594978721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 45342722 + ... + 45344322.

Almost surely, 2^72594978722 is an apocalyptic number.

72594978722 is a deficient number, since it is larger than the sum of its proper divisors (62049484369).

72594978722 is an equidigital number, since it uses as much as digits as its factorization.

72594978722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3252 (or 1627 counting only the distinct ones).

The product of its digits is 35562240, while the sum is 62.

The spelling of 72594978722 in words is "seventy-two billion, five hundred ninety-four million, nine hundred seventy-eight thousand, seven hundred twenty-two".