138383857778637 has 16 divisors (see below), whose sum is σ = 185330800182528. Its totient is φ = 91846526065920.

The previous prime is 138383857778633. The next prime is 138383857778671. The reversal of 138383857778637 is 736877758383831.

It is not a de Polignac number, because 138383857778637 - 2² = 138383857778633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138383857778637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138383857778633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9687813 + ... + 19251530.

It is an arithmetic number, because the mean of its divisors is an integer number (11583175011408).

Almost surely, 2^{138383857778637} is an apocalyptic number.

It is an amenable number.

138383857778637 is a deficient number, since it is larger than the sum of its proper divisors (46946942403891).

138383857778637 is a wasteful number, since it uses less digits than its factorization.

138383857778637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28946420.

The product of its digits is 23897825280, while the sum is 84.

The spelling of 138383857778637 in words is "one hundred thirty-eight trillion, three hundred eighty-three billion, eight hundred fifty-seven million, seven hundred seventy-eight thousand, six hundred thirty-seven".