138801078405013 has 4 divisors (see below), whose sum is σ = 140232017357740. Its totient is φ = 137370139452288.

The previous prime is 138801078404977. The next prime is 138801078405023. The reversal of 138801078405013 is 310504870108831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38671396388689 + 100129682016324 = 6218633^2 + 10006482^2 .

It is a cyclic number.

It is not a de Polignac number, because 138801078405013 - 2⁹ = 138801078404501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138801078405023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 715469476218 + ... + 715469476411.

It is an arithmetic number, because the mean of its divisors is an integer number (35058004339435).

Almost surely, 2^{138801078405013} is an apocalyptic number.

It is an amenable number.

138801078405013 is a deficient number, since it is larger than the sum of its proper divisors (1430938952727).

138801078405013 is an equidigital number, since it uses as much as digits as its factorization.

138801078405013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430938952726.

The product of its (nonzero) digits is 645120, while the sum is 49.

The spelling of 138801078405013 in words is "one hundred thirty-eight trillion, eight hundred one billion, seventy-eight million, four hundred five thousand, thirteen".