138857751056 has 30 divisors (see below), whose sum is σ = 275617712202. Its totient is φ = 67730832640.

The previous prime is 138857751047. The next prime is 138857751073. The reversal of 138857751056 is 650157758831.

138857751056 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 29439696400 + 109418054656 = 171580^2 + 330784^2 .

It is a junction number, because it is equal to n+sod(n) for n = 138857750992 and 138857751010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9536870 + ... + 9551418.

Almost surely, 2^138857751056 is an apocalyptic number.

138857751056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138857751056 is a deficient number, since it is larger than the sum of its proper divisors (136759961146).

138857751056 is an frugal number, since it uses more digits than its factorization.

138857751056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29147 (or 14592 counting only the distinct ones).

The product of its (nonzero) digits is 7056000, while the sum is 56.

The spelling of 138857751056 in words is "one hundred thirty-eight billion, eight hundred fifty-seven million, seven hundred fifty-one thousand, fifty-six".