40636655 has 4 divisors (see below), whose sum is σ = 48763992. Its totient is φ = 32509320.

The previous prime is 40636601. The next prime is 40636657. The reversal of 40636655 is 55663604.

40636655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 40636655 - 2¹⁰ = 40635631 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 (40636657) 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, 4063661 + ... + 4063670.

It is an arithmetic number, because the mean of its divisors is an integer number (12190998).

Almost surely, 2^40636655 is an apocalyptic number.

40636655 is a deficient number, since it is larger than the sum of its proper divisors (8127337).

40636655 is an equidigital number, since it uses as much as digits as its factorization.

40636655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8127336.

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 40636655 is about 6374.6886198465. The cubic root of 40636655 is about 343.8000883486.

The spelling of 40636655 in words is "forty million, six hundred thirty-six thousand, six hundred fifty-five".