138877481864419 has 2 divisors, whose sum is σ = 138877481864420. Its totient is φ = 138877481864418.

The previous prime is 138877481864371. The next prime is 138877481864477. The reversal of 138877481864419 is 914468184778831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138877481864419 - 2¹⁵ = 138877481831651 is a prime.

It is a super-2 number, since 2×138877481864419² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (138877481867419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69438740932209 + 69438740932210.

It is an arithmetic number, because the mean of its divisors is an integer number (69438740932210).

Almost surely, 2^{138877481864419} is an apocalyptic number.

138877481864419 is a deficient number, since it is larger than the sum of its proper divisors (1).

138877481864419 is an equidigital number, since it uses as much as digits as its factorization.

138877481864419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2080899072, while the sum is 79.

The spelling of 138877481864419 in words is "one hundred thirty-eight trillion, eight hundred seventy-seven billion, four hundred eighty-one million, eight hundred sixty-four thousand, four hundred nineteen".