138402555941 has 8 divisors (see below), whose sum is σ = 154188524280. Its totient is φ = 123350818752.

The previous prime is 138402555937. The next prime is 138402555943. The reversal of 138402555941 is 149555204831.

It can be written as a sum of positive squares in 4 ways, for example, as 18042131041 + 120360424900 = 134321^2 + 346930^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138402555941 - 2² = 138402555937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138402555943) 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 7 ways as a sum of consecutive naturals, for example, 183557390 + ... + 183558143.

It is an arithmetic number, because the mean of its divisors is an integer number (19273565535).

Almost surely, 2^138402555941 is an apocalyptic number.

It is an amenable number.

138402555941 is a deficient number, since it is larger than the sum of its proper divisors (15785968339).

138402555941 is a wasteful number, since it uses less digits than its factorization.

138402555941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367115575.

The product of its (nonzero) digits is 864000, while the sum is 47.

The spelling of 138402555941 in words is "one hundred thirty-eight billion, four hundred two million, five hundred fifty-five thousand, nine hundred forty-one".