72504241556 has 12 divisors (see below), whose sum is σ = 127241865492. Its totient is φ = 36149422848.

The previous prime is 72504241549. The next prime is 72504241559. The reversal of 72504241556 is 65514240527.

It can be written as a sum of positive squares in 2 ways, for example, as 31847971600 + 40656269956 = 178460^2 + 201634^2 .

It is a super-2 number, since 2×72504241556² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72504241559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25672895 + ... + 25675718.

It is an arithmetic number, because the mean of its divisors is an integer number (10603488791).

Almost surely, 2^72504241556 is an apocalyptic number.

It is an amenable number.

72504241556 is a deficient number, since it is larger than the sum of its proper divisors (54737623936).

72504241556 is a wasteful number, since it uses less digits than its factorization.

72504241556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51348970 (or 51348968 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 41.

The spelling of 72504241556 in words is "seventy-two billion, five hundred four million, two hundred forty-one thousand, five hundred fifty-six".