40561567 has 4 divisors (see below), whose sum is σ = 40574320. Its totient is φ = 40548816.

The previous prime is 40561559. The next prime is 40561571. The reversal of 40561567 is 76516504.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 40561567 - 2³ = 40561559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40561537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2734 + ... + 9412.

It is an arithmetic number, because the mean of its divisors is an integer number (10143580).

Almost surely, 2^40561567 is an apocalyptic number.

40561567 is a deficient number, since it is larger than the sum of its proper divisors (12753).

40561567 is an equidigital number, since it uses as much as digits as its factorization.

40561567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12752.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 40561567 is about 6368.7963541002. The cubic root of 40561567 is about 343.5882010121.

The spelling of 40561567 in words is "forty million, five hundred sixty-one thousand, five hundred sixty-seven".