138895286680 has 64 divisors (see below), whose sum is σ = 316893296160. Its totient is φ = 54780115968.

The previous prime is 138895286623. The next prime is 138895286683. The reversal of 138895286680 is 86682598831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138895286683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14049019 + ... + 14058901.

Almost surely, 2^138895286680 is an apocalyptic number.

138895286680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138895286680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158446648080).

138895286680 is an abundant number, since it is smaller than the sum of its proper divisors (177998009480).

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

138895286680 is a wasteful number, since it uses less digits than its factorization.

138895286680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14780 (or 14776 counting only the distinct ones).

The product of its (nonzero) digits is 39813120, while the sum is 64.

The spelling of 138895286680 in words is "one hundred thirty-eight billion, eight hundred ninety-five million, two hundred eighty-six thousand, six hundred eighty".