138801078405055 has 12 divisors (see below), whose sum is σ = 183079769533416. Its totient is φ = 100946238839600.

The previous prime is 138801078405049. The next prime is 138801078405089. The reversal of 138801078405055 is 550504870108831.

It is not a de Polignac number, because 138801078405055 - 2⁵ = 138801078405023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138801078404987 and 138801078405005.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 114711634441 + ... + 114711635650.

It is an arithmetic number, because the mean of its divisors is an integer number (15256647461118).

Almost surely, 2^{138801078405055} is an apocalyptic number.

138801078405055 is a deficient number, since it is larger than the sum of its proper divisors (44278691128361).

138801078405055 is a wasteful number, since it uses less digits than its factorization.

138801078405055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229423270118 (or 229423270107 counting only the distinct ones).

The product of its (nonzero) digits is 5376000, while the sum is 55.

The spelling of 138801078405055 in words is "one hundred thirty-eight trillion, eight hundred one billion, seventy-eight million, four hundred five thousand, fifty-five".