138400943802 has 64 divisors (see below), whose sum is σ = 312453365760. Its totient is φ = 40483755200.

The previous prime is 138400943801. The next prime is 138400943809. The reversal of 138400943802 is 208349004831.

138400943802 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (138400943801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13222423 + ... + 13232885.

It is an arithmetic number, because the mean of its divisors is an integer number (4882083840).

Almost surely, 2^138400943802 is an apocalyptic number.

138400943802 is an abundant number, since it is smaller than the sum of its proper divisors (174052421958).

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

138400943802 is a wasteful number, since it uses less digits than its factorization.

138400943802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17419.

The product of its (nonzero) digits is 165888, while the sum is 42.

The spelling of 138400943802 in words is "one hundred thirty-eight billion, four hundred million, nine hundred forty-three thousand, eight hundred two".