138308808060 has 72 divisors (see below), whose sum is σ = 419724985680. Its totient is φ = 36865797888.

The previous prime is 138308808037. The next prime is 138308808061. The reversal of 138308808060 is 60808803831.

138308808060 is a `hidden beast` number, since 138 + 308 + 80 + 80 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 138308807997 and 138308808015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138308808061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 232456 + ... + 575024.

It is an arithmetic number, because the mean of its divisors is an integer number (5829513690).

Almost surely, 2^138308808060 is an apocalyptic number.

138308808060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138308808060 is an abundant number, since it is smaller than the sum of its proper divisors (281416177620).

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

138308808060 is a wasteful number, since it uses less digits than its factorization.

138308808060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344827 (or 344822 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 138308808060 in words is "one hundred thirty-eight billion, three hundred eight million, eight hundred eight thousand, sixty".