72554447 has 16 divisors (see below), whose sum is σ = 86913600. Its totient is φ = 60498144.

The previous prime is 72554431. The next prime is 72554473. The reversal of 72554447 is 74445527.

It is not a de Polignac number, because 72554447 - 2⁴ = 72554431 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72554447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72554497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9833 + ... + 15549.

It is an arithmetic number, because the mean of its divisors is an integer number (5432100).

Almost surely, 2^72554447 is an apocalyptic number.

72554447 is a deficient number, since it is larger than the sum of its proper divisors (14359153).

72554447 is an equidigital number, since it uses as much as digits as its factorization.

72554447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5775 (or 5761 counting only the distinct ones).

The product of its digits is 156800, while the sum is 38.

The square root of 72554447 is about 8517.8898208418. The cubic root of 72554447 is about 417.0819020713.

The spelling of 72554447 in words is "seventy-two million, five hundred fifty-four thousand, four hundred forty-seven".