72563605 has 4 divisors (see below), whose sum is σ = 87076332. Its totient is φ = 58050880.

The previous prime is 72563581. The next prime is 72563611. The reversal of 72563605 is 50636527.

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 45252529 + 27311076 = 6727^2 + 5226^2 .

It is not a de Polignac number, because 72563605 - 2⁵ = 72563573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7256356 + ... + 7256365.

It is an arithmetic number, because the mean of its divisors is an integer number (21769083).

Almost surely, 2^72563605 is an apocalyptic number.

It is an amenable number.

72563605 is a deficient number, since it is larger than the sum of its proper divisors (14512727).

72563605 is a wasteful number, since it uses less digits than its factorization.

72563605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14512726.

The product of its (nonzero) digits is 37800, while the sum is 34.

The square root of 72563605 is about 8518.4273783369. The cubic root of 72563605 is about 417.0994496994.

The spelling of 72563605 in words is "seventy-two million, five hundred sixty-three thousand, six hundred five".