40561603 has 4 divisors (see below), whose sum is σ = 40578928. Its totient is φ = 40544280.

The previous prime is 40561601. The next prime is 40561607. The reversal of 40561603 is 30616504.

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 40561603 - 2¹ = 40561601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40561601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4476 + ... + 10057.

It is an arithmetic number, because the mean of its divisors is an integer number (10144732).

Almost surely, 2^40561603 is an apocalyptic number.

40561603 is a deficient number, since it is larger than the sum of its proper divisors (17325).

40561603 is a wasteful number, since it uses less digits than its factorization.

40561603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17324.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 40561603 is about 6368.7991803793. The cubic root of 40561603 is about 343.5883026615.

The spelling of 40561603 in words is "forty million, five hundred sixty-one thousand, six hundred three".