72472918728 has 128 divisors (see below), whose sum is σ = 214600458240. Its totient is φ = 19958400000.

The previous prime is 72472918711. The next prime is 72472918729. The reversal of 72472918728 is 82781927427.

It is not an unprimeable number, because it can be changed into a prime (72472918729) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1279488 + ... + 1334928.

It is an arithmetic number, because the mean of its divisors is an integer number (1676566080).

Almost surely, 2^72472918728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72472918728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107300229120).

72472918728 is an abundant number, since it is smaller than the sum of its proper divisors (142127539512).

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

72472918728 is a wasteful number, since it uses less digits than its factorization.

72472918728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55739 (or 55735 counting only the distinct ones).

The product of its digits is 6322176, while the sum is 57.

The spelling of 72472918728 in words is "seventy-two billion, four hundred seventy-two million, nine hundred eighteen thousand, seven hundred twenty-eight".