138844428025801 has 4 divisors (see below), whose sum is σ = 138848547705472. Its totient is φ = 138840308346132.

The previous prime is 138844428025759. The next prime is 138844428025861. The reversal of 138844428025801 is 108520824448831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 138844428025801 - 2¹¹ = 138844428023753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138844428025861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2059789281 + ... + 2059856686.

It is an arithmetic number, because the mean of its divisors is an integer number (34712136926368).

Almost surely, 2^{138844428025801} is an apocalyptic number.

It is an amenable number.

138844428025801 is a deficient number, since it is larger than the sum of its proper divisors (4119679671).

138844428025801 is an equidigital number, since it uses as much as digits as its factorization.

138844428025801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4119679670.

The product of its (nonzero) digits is 15728640, while the sum is 58.

The spelling of 138844428025801 in words is "one hundred thirty-eight trillion, eight hundred forty-four billion, four hundred twenty-eight million, twenty-five thousand, eight hundred one".