138808745019 has 72 divisors (see below), whose sum is σ = 234926782272. Its totient is φ = 78746653440.

The previous prime is 138808745003. The next prime is 138808745029. The reversal of 138808745019 is 910547808831.

138808745019 is a `hidden beast` number, since 1 + 38 + 80 + 87 + 450 + 1 + 9 = 666.

It is not a de Polignac number, because 138808745019 - 2⁴ = 138808745003 is a prime.

It is a super-2 number, since 2×138808745019² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138808745029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 36306942 + ... + 36310764.

It is an arithmetic number, because the mean of its divisors is an integer number (3262871976).

Almost surely, 2^138808745019 is an apocalyptic number.

138808745019 is a deficient number, since it is larger than the sum of its proper divisors (96118037253).

138808745019 is a wasteful number, since it uses less digits than its factorization.

138808745019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4417 (or 4407 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 54.

The spelling of 138808745019 in words is "one hundred thirty-eight billion, eight hundred eight million, seven hundred forty-five thousand, nineteen".