73522972240 has 80 divisors (see below), whose sum is σ = 181390421520. Its totient is φ = 27618959360.

The previous prime is 73522972199. The next prime is 73522972277. The reversal of 73522972240 is 4227922537.

It can be written as a sum of positive squares in 8 ways, for example, as 3389102656 + 70133869584 = 58216^2 + 264828^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 568326 + ... + 685594.

It is an arithmetic number, because the mean of its divisors is an integer number (2267380269).

Almost surely, 2^73522972240 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 73522972240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90695210760).

73522972240 is an abundant number, since it is smaller than the sum of its proper divisors (107867449280).

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

73522972240 is a wasteful number, since it uses less digits than its factorization.

73522972240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117760 (or 117754 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 43.

It can be divided in two parts, 7352297 and 2240, that added together give a palindrome (7354537).

The spelling of 73522972240 in words is "seventy-three billion, five hundred twenty-two million, nine hundred seventy-two thousand, two hundred forty".