72540555252 has 48 divisors (see below), whose sum is σ = 185163148800. Its totient is φ = 21920740960.

The previous prime is 72540555233. The next prime is 72540555257. The reversal of 72540555252 is 25255504527.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72540555257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 718002 + ... + 812777.

It is an arithmetic number, because the mean of its divisors is an integer number (3857565600).

Almost surely, 2^72540555252 is an apocalyptic number.

It is an amenable number.

72540555252 is an abundant number, since it is smaller than the sum of its proper divisors (112622593548).

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

72540555252 is a wasteful number, since it uses less digits than its factorization.

72540555252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531156 (or 1531154 counting only the distinct ones).

The product of its (nonzero) digits is 700000, while the sum is 42.

The spelling of 72540555252 in words is "seventy-two billion, five hundred forty million, five hundred fifty-five thousand, two hundred fifty-two".