80722732644 has 144 divisors (see below), whose sum is σ = 226649404800. Its totient is φ = 24108682752.

The previous prime is 80722732639. The next prime is 80722732669. The reversal of 80722732644 is 44623722708.

It is a self number, because there is not a number n which added to its sum of digits gives 80722732644.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1371322 + ... + 1428974.

It is an arithmetic number, because the mean of its divisors is an integer number (1573954200).

Almost surely, 2^80722732644 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 80722732644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113324702400).

80722732644 is an abundant number, since it is smaller than the sum of its proper divisors (145926672156).

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

80722732644 is a wasteful number, since it uses less digits than its factorization.

80722732644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57794 (or 57789 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 45.

The spelling of 80722732644 in words is "eighty billion, seven hundred twenty-two million, seven hundred thirty-two thousand, six hundred forty-four".