72845281792 has 80 divisors (see below), whose sum is σ = 155325772800. Its totient is φ = 34009694208.

The previous prime is 72845281777. The next prime is 72845281799. The reversal of 72845281792 is 29718254827.

It is not an unprimeable number, because it can be changed into a prime (72845281799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1072459 + ... + 1138357.

It is an arithmetic number, because the mean of its divisors is an integer number (1941572160).

Almost surely, 2^72845281792 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 72845281792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77662886400).

72845281792 is an abundant number, since it is smaller than the sum of its proper divisors (82480491008).

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

72845281792 is a wasteful number, since it uses less digits than its factorization.

72845281792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66061 (or 66045 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 55.

The spelling of 72845281792 in words is "seventy-two billion, eight hundred forty-five million, two hundred eighty-one thousand, seven hundred ninety-two".