72720287500 has 180 divisors, whose sum is σ = 185641899408. Its totient is φ = 24922380000.

The previous prime is 72720287489. The next prime is 72720287533. The reversal of 72720287500 is 578202727.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 30011289 + ... + 30013711.

Almost surely, 2^72720287500 is an apocalyptic number.

72720287500 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72720287500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92820949704).

72720287500 is an abundant number, since it is smaller than the sum of its proper divisors (112921611908).

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

72720287500 is an frugal number, since it uses more digits than its factorization.

72720287500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2480 (or 2437 counting only the distinct ones).

The product of its (nonzero) digits is 109760, while the sum is 40.

The spelling of 72720287500 in words is "seventy-two billion, seven hundred twenty million, two hundred eighty-seven thousand, five hundred".