72554549 has 4 divisors (see below), whose sum is σ = 75056460. Its totient is φ = 70052640.

The previous prime is 72554527. The next prime is 72554551. The reversal of 72554549 is 94545527.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26450449 + 46104100 = 5143^2 + 6790^2 .

It is a cyclic number.

It is not a de Polignac number, because 72554549 - 2¹² = 72550453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72554519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1250912 + ... + 1250969.

It is an arithmetic number, because the mean of its divisors is an integer number (18764115).

Almost surely, 2^72554549 is an apocalyptic number.

It is an amenable number.

72554549 is a deficient number, since it is larger than the sum of its proper divisors (2501911).

72554549 is a wasteful number, since it uses less digits than its factorization.

72554549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2501910.

The product of its digits is 252000, while the sum is 41.

The square root of 72554549 is about 8517.8958082381. The cubic root of 72554549 is about 417.0820975214.

The spelling of 72554549 in words is "seventy-two million, five hundred fifty-four thousand, five hundred forty-nine".