40631438171 has 4 divisors (see below), whose sum is σ = 40650507144. Its totient is φ = 40612369200.

The previous prime is 40631438161. The next prime is 40631438173. The reversal of 40631438171 is 17183413604.

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-40631438171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40631438173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9531290 + ... + 9535551.

It is an arithmetic number, because the mean of its divisors is an integer number (10162626786).

Almost surely, 2^40631438171 is an apocalyptic number.

40631438171 is a deficient number, since it is larger than the sum of its proper divisors (19068973).

40631438171 is a wasteful number, since it uses less digits than its factorization.

40631438171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19068972.

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 40631438171 in words is "forty billion, six hundred thirty-one million, four hundred thirty-eight thousand, one hundred seventy-one".