72455603 has 4 divisors (see below), whose sum is σ = 79042488. Its totient is φ = 65868720.

The previous prime is 72455549. The next prime is 72455671. The reversal of 72455603 is 30655427.

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

It is a cyclic number.

It is not a de Polignac number, because 72455603 - 2¹⁰ = 72454579 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 72455603.

It is not an unprimeable number, because it can be changed into a prime (72455693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3293426 + ... + 3293447.

It is an arithmetic number, because the mean of its divisors is an integer number (19760622).

Almost surely, 2^72455603 is an apocalyptic number.

72455603 is a deficient number, since it is larger than the sum of its proper divisors (6586885).

72455603 is a wasteful number, since it uses less digits than its factorization.

72455603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6586884.

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 72455603 is about 8512.0857021062. The cubic root of 72455603 is about 416.8924132081.

The spelling of 72455603 in words is "seventy-two million, four hundred fifty-five thousand, six hundred three".