138877711571 has 2 divisors, whose sum is σ = 138877711572. Its totient is φ = 138877711570.

The previous prime is 138877711559. The next prime is 138877711573. The reversal of 138877711571 is 175117778831.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138877711571 - 2²² = 138873517267 is a prime.

Together with 138877711573, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (138877711573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69438855785 + 69438855786.

It is an arithmetic number, because the mean of its divisors is an integer number (69438855786).

Almost surely, 2^138877711571 is an apocalyptic number.

138877711571 is a deficient number, since it is larger than the sum of its proper divisors (1).

138877711571 is an equidigital number, since it uses as much as digits as its factorization.

138877711571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304960, while the sum is 56.

The spelling of 138877711571 in words is "one hundred thirty-eight billion, eight hundred seventy-seven million, seven hundred eleven thousand, five hundred seventy-one".