72530766531420 has 24 divisors (see below), whose sum is σ = 203086146288144. Its totient is φ = 19341537741696.

The previous prime is 72530766531373. The next prime is 72530766531481. The reversal of 72530766531420 is 2413566703527.

It is a happy number.

It is a super-3 number, since 3×72530766531420³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 604423054369 + ... + 604423054488.

It is an arithmetic number, because the mean of its divisors is an integer number (8461922762006).

Almost surely, 2^{72530766531420} is an apocalyptic number.

It is an amenable number.

72530766531420 is an abundant number, since it is smaller than the sum of its proper divisors (130555379756724).

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

72530766531420 is a wasteful number, since it uses less digits than its factorization.

72530766531420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208846108869 (or 1208846108867 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 51.

The spelling of 72530766531420 in words is "seventy-two trillion, five hundred thirty billion, seven hundred sixty-six million, five hundred thirty-one thousand, four hundred twenty".