138938187627 has 32 divisors (see below), whose sum is σ = 211791712320. Its totient is φ = 91106920800.

The previous prime is 138938187611. The next prime is 138938187637. The reversal of 138938187627 is 726781839831.

It is not a de Polignac number, because 138938187627 - 2⁴ = 138938187611 is a prime.

It is a super-2 number, since 2×138938187627² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138938187637) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 387324 + ... + 654137.

It is an arithmetic number, because the mean of its divisors is an integer number (6618491010).

Almost surely, 2^138938187627 is an apocalyptic number.

138938187627 is a deficient number, since it is larger than the sum of its proper divisors (72853524693).

138938187627 is an frugal number, since it uses more digits than its factorization.

138938187627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041543 (or 1041525 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 63.

The spelling of 138938187627 in words is "one hundred thirty-eight billion, nine hundred thirty-eight million, one hundred eighty-seven thousand, six hundred twenty-seven".