42636611 has 4 divisors (see below), whose sum is σ = 43035192. Its totient is φ = 42238032.

The previous prime is 42636593. The next prime is 42636613. The reversal of 42636611 is 11663624.

It is a happy number.

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 42636611 - 2¹⁰ = 42635587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42636613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199130 + ... + 199343.

It is an arithmetic number, because the mean of its divisors is an integer number (10758798).

Almost surely, 2^42636611 is an apocalyptic number.

42636611 is a deficient number, since it is larger than the sum of its proper divisors (398581).

42636611 is a wasteful number, since it uses less digits than its factorization.

42636611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398580.

The product of its digits is 5184, while the sum is 29.

The square root of 42636611 is about 6529.6715843907. The cubic root of 42636611 is about 349.3501164856.

The spelling of 42636611 in words is "forty-two million, six hundred thirty-six thousand, six hundred eleven".