138761822736243 has 64 divisors (see below), whose sum is σ = 240432331392000. Its totient is φ = 77439457105920.

The previous prime is 138761822736223. The next prime is 138761822736253. The reversal of 138761822736243 is 342637228167831.

138761822736243 is a `hidden beast` number, since 1 + 3 + 8 + 7 + 6 + 1 + 8 + 227 + 362 + 43 = 666.

It is not a de Polignac number, because 138761822736243 - 2⁵ = 138761822736211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (138761822736223) 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 in 63 ways as a sum of consecutive naturals, for example, 69237433 + ... + 71213381.

It is an arithmetic number, because the mean of its divisors is an integer number (3756755178000).

Almost surely, 2^{138761822736243} is an apocalyptic number.

138761822736243 is a deficient number, since it is larger than the sum of its proper divisors (101670508655757).

138761822736243 is a wasteful number, since it uses less digits than its factorization.

138761822736243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1984649 (or 1984643 counting only the distinct ones).

The product of its digits is 97542144, while the sum is 63.

The spelling of 138761822736243 in words is "one hundred thirty-eight trillion, seven hundred sixty-one billion, eight hundred twenty-two million, seven hundred thirty-six thousand, two hundred forty-three".