138221217582677 has 16 divisors (see below), whose sum is σ = 140766116016960. Its totient is φ = 135695395135872.

The previous prime is 138221217582629. The next prime is 138221217582757. The reversal of 138221217582677 is 776285712122831.

It is a cyclic number.

It is not a de Polignac number, because 138221217582677 - 2¹⁴ = 138221217566293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138221217572677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8449643 + ... + 18650439.

It is an arithmetic number, because the mean of its divisors is an integer number (8797882251060).

Almost surely, 2^{138221217582677} is an apocalyptic number.

It is an amenable number.

138221217582677 is a deficient number, since it is larger than the sum of its proper divisors (2544898434283).

138221217582677 is a wasteful number, since it uses less digits than its factorization.

138221217582677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10201732.

The product of its digits is 31610880, while the sum is 62.

The spelling of 138221217582677 in words is "one hundred thirty-eight trillion, two hundred twenty-one billion, two hundred seventeen million, five hundred eighty-two thousand, six hundred seventy-seven".