72180003696 has 80 divisors (see below), whose sum is σ = 195353115648. Its totient is φ = 22936320000.

The previous prime is 72180003677. The next prime is 72180003703. The reversal of 72180003696 is 69630008127.

It is a happy number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 262305 + ... + 461696.

Almost surely, 2^72180003696 is an apocalyptic number.

It is an amenable number.

72180003696 is an abundant number, since it is smaller than the sum of its proper divisors (123173111952).

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

72180003696 is a wasteful number, since it uses less digits than its factorization.

72180003696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724110 (or 724104 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The spelling of 72180003696 in words is "seventy-two billion, one hundred eighty million, three thousand, six hundred ninety-six".