138906801800 has 48 divisors (see below), whose sum is σ = 347801267940. Its totient is φ = 51288664320.

The previous prime is 138906801791. The next prime is 138906801827. The reversal of 138906801800 is 8108609831.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 24179628004 + 114727173796 = 155498^2 + 338714^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26710247 + ... + 26715446.

Almost surely, 2^138906801800 is an apocalyptic number.

138906801800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138906801800 is an abundant number, since it is smaller than the sum of its proper divisors (208894466140).

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

138906801800 is a wasteful number, since it uses less digits than its factorization.

138906801800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53425722 (or 53425713 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 44.

The spelling of 138906801800 in words is "one hundred thirty-eight billion, nine hundred six million, eight hundred one thousand, eight hundred".