72530755642422 has 288 divisors, whose sum is σ = 199074955322880. Its totient is φ = 18681047193600.

The previous prime is 72530755642381. The next prime is 72530755642441. The reversal of 72530755642422 is 22424655703527.

72530755642422 is a `hidden beast` number, since 7 + 2 + 5 + 3 + 0 + 7 + 556 + 42 + 42 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 915071029 + ... + 915150287.

It is an arithmetic number, because the mean of its divisors is an integer number (691232483760).

Almost surely, 2^{72530755642422} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72530755642422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99537477661440).

72530755642422 is an abundant number, since it is smaller than the sum of its proper divisors (126544199680458).

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

72530755642422 is a wasteful number, since it uses less digits than its factorization.

72530755642422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79800 (or 79786 counting only the distinct ones).

The product of its (nonzero) digits is 28224000, while the sum is 54.

The spelling of 72530755642422 in words is "seventy-two trillion, five hundred thirty billion, seven hundred fifty-five million, six hundred forty-two thousand, four hundred twenty-two".