72554643 has 48 divisors (see below), whose sum is σ = 126156960. Its totient is φ = 41090112.

The previous prime is 72554639. The next prime is 72554659. The reversal of 72554643 is 34645527.

72554643 is a `hidden beast` number, since 7 + 2 + 5 + 5 + 4 + 643 = 666.

It is not a de Polignac number, because 72554643 - 2² = 72554639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72554598 and 72554607.

It is not an unprimeable number, because it can be changed into a prime (72554633) 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 47 ways as a sum of consecutive naturals, for example, 228721 + ... + 229037.

It is an arithmetic number, because the mean of its divisors is an integer number (2628270).

Almost surely, 2^72554643 is an apocalyptic number.

72554643 is a deficient number, since it is larger than the sum of its proper divisors (53602317).

72554643 is a wasteful number, since it uses less digits than its factorization.

72554643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513 (or 500 counting only the distinct ones).

The product of its digits is 100800, while the sum is 36.

The square root of 72554643 is about 8517.9013260310. The cubic root of 72554643 is about 417.0822776420.

The spelling of 72554643 in words is "seventy-two million, five hundred fifty-four thousand, six hundred forty-three".