138221811080 has 64 divisors (see below), whose sum is σ = 324625449600. Its totient is φ = 52867809280.

The previous prime is 138221811067. The next prime is 138221811137. The reversal of 138221811080 is 80118122831.

It is a self number, because there is not a number n which added to its sum of digits gives 138221811080.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3040115 + ... + 3085245.

It is an arithmetic number, because the mean of its divisors is an integer number (5072272650).

Almost surely, 2^138221811080 is an apocalyptic number.

138221811080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138221811080 is an abundant number, since it is smaller than the sum of its proper divisors (186403638520).

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

138221811080 is a wasteful number, since it uses less digits than its factorization.

138221811080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48494 (or 48490 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 35.

The spelling of 138221811080 in words is "one hundred thirty-eight billion, two hundred twenty-one million, eight hundred eleven thousand, eighty".