40636606187 has 4 divisors (see below), whose sum is σ = 40637301600. Its totient is φ = 40635910776.

The previous prime is 40636606141. The next prime is 40636606189. The reversal of 40636606187 is 78160663604.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40636606187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40636606189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251108 + ... + 379905.

It is an arithmetic number, because the mean of its divisors is an integer number (10159325400).

Almost surely, 2^40636606187 is an apocalyptic number.

40636606187 is a deficient number, since it is larger than the sum of its proper divisors (695413).

40636606187 is an equidigital number, since it uses as much as digits as its factorization.

40636606187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695412.

The product of its (nonzero) digits is 870912, while the sum is 47.

The spelling of 40636606187 in words is "forty billion, six hundred thirty-six million, six hundred six thousand, one hundred eighty-seven".