138781806673588 has 24 divisors (see below), whose sum is σ = 262905511027208. Its totient is φ = 63721259974656.

The previous prime is 138781806673561. The next prime is 138781806673597. The reversal of 138781806673588 is 885376608187831.

It can be written as a sum of positive squares in 4 ways, for example, as 1991519308944 + 136790287364644 = 1411212^2 + 11695738^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6914189181 + ... + 6914209252.

Almost surely, 2^{138781806673588} is an apocalyptic number.

It is an amenable number.

138781806673588 is a deficient number, since it is larger than the sum of its proper divisors (124123704353620).

138781806673588 is a wasteful number, since it uses less digits than its factorization.

138781806673588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13828398643 (or 13828398641 counting only the distinct ones).

The product of its (nonzero) digits is 2601123840, while the sum is 79.

The spelling of 138781806673588 in words is "one hundred thirty-eight trillion, seven hundred eighty-one billion, eight hundred six million, six hundred seventy-three thousand, five hundred eighty-eight".