72718623524 has 24 divisors (see below), whose sum is σ = 130466175000. Its totient is φ = 35443998720.

The previous prime is 72718623517. The next prime is 72718623557. The reversal of 72718623524 is 42532681727.

It can be written as a sum of positive squares in 4 ways, for example, as 2238993124 + 70479630400 = 47318^2 + 265480^2 .

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

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 7 ways as a sum of consecutive naturals, for example, 27332 + ... + 382340.

It is an arithmetic number, because the mean of its divisors is an integer number (5436090625).

Almost surely, 2^72718623524 is an apocalyptic number.

It is an amenable number.

72718623524 is a deficient number, since it is larger than the sum of its proper divisors (57747551476).

72718623524 is a wasteful number, since it uses less digits than its factorization.

72718623524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356303 (or 356301 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 47.

The spelling of 72718623524 in words is "seventy-two billion, seven hundred eighteen million, six hundred twenty-three thousand, five hundred twenty-four".