138556700817287 has 2 divisors, whose sum is σ = 138556700817288. Its totient is φ = 138556700817286.

The previous prime is 138556700817263. The next prime is 138556700817299. The reversal of 138556700817287 is 782718007655831.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138556700817287 - 2³⁶ = 138487981340551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138556700819287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69278350408643 + 69278350408644.

It is an arithmetic number, because the mean of its divisors is an integer number (69278350408644).

Almost surely, 2^{138556700817287} is an apocalyptic number.

138556700817287 is a deficient number, since it is larger than the sum of its proper divisors (1).

138556700817287 is an equidigital number, since it uses as much as digits as its factorization.

138556700817287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 158054400, while the sum is 68.

The spelling of 138556700817287 in words is "one hundred thirty-eight trillion, five hundred fifty-six billion, seven hundred million, eight hundred seventeen thousand, two hundred eighty-seven".