138144437677 has 16 divisors (see below), whose sum is σ = 147132961920. Its totient is φ = 129432193792.

The previous prime is 138144437659. The next prime is 138144437713. The reversal of 138144437677 is 776734441831.

It is a cyclic number.

It is not a de Polignac number, because 138144437677 - 2¹¹ = 138144435629 is a prime.

It is a super-2 number, since 2×138144437677² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138144437617) 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, 96328 + ... + 534385.

It is an arithmetic number, because the mean of its divisors is an integer number (9195810120).

Almost surely, 2^138144437677 is an apocalyptic number.

It is an amenable number.

138144437677 is a deficient number, since it is larger than the sum of its proper divisors (8988524243).

138144437677 is a wasteful number, since it uses less digits than its factorization.

138144437677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630932.

The product of its digits is 9483264, while the sum is 55.

The spelling of 138144437677 in words is "one hundred thirty-eight billion, one hundred forty-four million, four hundred thirty-seven thousand, six hundred seventy-seven".