40635563 has 2 divisors, whose sum is σ = 40635564. Its totient is φ = 40635562.

The previous prime is 40635557. The next prime is 40635599. The reversal of 40635563 is 36553604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40635563 - 2⁶ = 40635499 is a prime.

It is not a weakly prime, because it can be changed into another prime (40635263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20317781 + 20317782.

It is an arithmetic number, because the mean of its divisors is an integer number (20317782).

Almost surely, 2^40635563 is an apocalyptic number.

40635563 is a deficient number, since it is larger than the sum of its proper divisors (1).

40635563 is an equidigital number, since it uses as much as digits as its factorization.

40635563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 32.

The square root of 40635563 is about 6374.6029680287. The cubic root of 40635563 is about 343.7970087557.

The spelling of 40635563 in words is "forty million, six hundred thirty-five thousand, five hundred sixty-three".