138143801500 has 24 divisors (see below), whose sum is σ = 301706063568. Its totient is φ = 55257520400.

The previous prime is 138143801489. The next prime is 138143801503. The reversal of 138143801500 is 5108341831.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138143801503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138143302 + ... + 138144301.

It is an arithmetic number, because the mean of its divisors is an integer number (12571085982).

Almost surely, 2^138143801500 is an apocalyptic number.

138143801500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138143801500 is an abundant number, since it is smaller than the sum of its proper divisors (163562262068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138143801500 is a wasteful number, since it uses less digits than its factorization.

138143801500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276287622 (or 276287610 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The spelling of 138143801500 in words is "one hundred thirty-eight billion, one hundred forty-three million, eight hundred one thousand, five hundred".