72543212260452 has 30 divisors (see below), whose sum is σ = 189642286373078. Its totient is φ = 24181070753376.

The previous prime is 72543212260429. The next prime is 72543212260457. The reversal of 72543212260452 is 25406221234527.

72543212260452 is a `hidden beast` number, since 7 + 2 + 5 + 4 + 32 + 1 + 2 + 2 + 604 + 5 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 47365557765696 + 25177654494756 = 6882264^2 + 5017734^2 .

It is a junction number, because it is equal to n+sod(n) for n = 72543212260398 and 72543212260407.

It is not an unprimeable number, because it can be changed into a prime (72543212260457) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 111949401313 + ... + 111949401960.

Almost surely, 2^{72543212260452} is an apocalyptic number.

It is an amenable number.

72543212260452 is an abundant number, since it is smaller than the sum of its proper divisors (117099074112626).

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

72543212260452 is a wasteful number, since it uses less digits than its factorization.

72543212260452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223898803289 (or 223898803278 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 45.

Adding to 72543212260452 its reverse (25406221234527), we get a palindrome (97949433494979).

The spelling of 72543212260452 in words is "seventy-two trillion, five hundred forty-three billion, two hundred twelve million, two hundred sixty thousand, four hundred fifty-two".