138215542056 has 32 divisors (see below), whose sum is σ = 346823402400. Its totient is φ = 45900574400.

The previous prime is 138215542019. The next prime is 138215542061. The reversal of 138215542056 is 650245512831.

138215542056 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 138215541999 and 138215542017.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10697970 + ... + 10710881.

It is an arithmetic number, because the mean of its divisors is an integer number (10838231325).

Almost surely, 2^138215542056 is an apocalyptic number.

It is an amenable number.

138215542056 is an abundant number, since it is smaller than the sum of its proper divisors (208607860344).

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

138215542056 is a wasteful number, since it uses less digits than its factorization.

138215542056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21409129 (or 21409125 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 42.

The spelling of 138215542056 in words is "one hundred thirty-eight billion, two hundred fifteen million, five hundred forty-two thousand, fifty-six".