72280730071550 has 576 divisors, whose sum is σ = 183528253440000. Its totient is φ = 20607979392000.

The previous prime is 72280730071547. The next prime is 72280730071577. The reversal of 72280730071550 is 5517003708227.

72280730071550 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 72280730071495 and 72280730071504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 49137137315 + ... + 49137138785.

It is an arithmetic number, because the mean of its divisors is an integer number (318625440000).

Almost surely, 2^{72280730071550} is an apocalyptic number.

72280730071550 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

72280730071550 is an abundant number, since it is smaller than the sum of its proper divisors (111247523368450).

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

72280730071550 is a wasteful number, since it uses less digits than its factorization.

72280730071550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273 (or 2257 counting only the distinct ones).

The product of its (nonzero) digits is 823200, while the sum is 47.

Adding to 72280730071550 its reverse (5517003708227), we get a palindrome (77797733779777).

The spelling of 72280730071550 in words is "seventy-two trillion, two hundred eighty billion, seven hundred thirty million, seventy-one thousand, five hundred fifty".