72542424528 has 120 divisors (see below), whose sum is σ = 240614058048. Its totient is φ = 20726399232.

The previous prime is 72542424499. The next prime is 72542424569. The reversal of 72542424528 is 82542424527.

72542424528 is a `hidden beast` number, since 7 + 2 + 542 + 42 + 45 + 28 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1305501 + ... + 1359932.

Almost surely, 2^72542424528 is an apocalyptic number.

It is an amenable number.

72542424528 is an abundant number, since it is smaller than the sum of its proper divisors (168071633520).

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

72542424528 is a wasteful number, since it uses less digits than its factorization.

72542424528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2665463 (or 2665445 counting only the distinct ones).

The product of its digits is 1433600, while the sum is 45.

Subtracting 72542424528 from its reverse (82542424527), we obtain a palindrome (9999999999).

The spelling of 72542424528 in words is "seventy-two billion, five hundred forty-two million, four hundred twenty-four thousand, five hundred twenty-eight".