138870880484381 has 2 divisors, whose sum is σ = 138870880484382. Its totient is φ = 138870880484380.

The previous prime is 138870880484291. The next prime is 138870880484389. The reversal of 138870880484381 is 183484088078831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136483960543225 + 2386919941156 = 11682635^2 + 1544966^2 .

It is a cyclic number.

It is not a de Polignac number, because 138870880484381 - 2³⁸ = 138596002577437 is a prime.

It is a super-2 number, since 2×138870880484381² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138870880484389) 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, 69435440242190 + 69435440242191.

It is an arithmetic number, because the mean of its divisors is an integer number (69435440242191).

Almost surely, 2^{138870880484381} is an apocalyptic number.

It is an amenable number.

138870880484381 is a deficient number, since it is larger than the sum of its proper divisors (1).

138870880484381 is an equidigital number, since it uses as much as digits as its factorization.

138870880484381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 264241152, while the sum is 71.

The spelling of 138870880484381 in words is "one hundred thirty-eight trillion, eight hundred seventy billion, eight hundred eighty million, four hundred eighty-four thousand, three hundred eighty-one".