4138871109251 has 2 divisors, whose sum is σ = 4138871109252. Its totient is φ = 4138871109250.

The previous prime is 4138871109181. The next prime is 4138871109271. The reversal of 4138871109251 is 1529011788314.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4138871109251 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4138871109251.

It is not a weakly prime, because it can be changed into another prime (4138871109271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2069435554625 + 2069435554626.

It is an arithmetic number, because the mean of its divisors is an integer number (2069435554626).

Almost surely, 2^{4138871109251} is an apocalyptic number.

4138871109251 is a deficient number, since it is larger than the sum of its proper divisors (1).

4138871109251 is an equidigital number, since it uses as much as digits as its factorization.

4138871109251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 50.

The spelling of 4138871109251 in words is "four trillion, one hundred thirty-eight billion, eight hundred seventy-one million, one hundred nine thousand, two hundred fifty-one".