138856163645 has 8 divisors (see below), whose sum is σ = 166634807904. Its totient is φ = 111079989904.

The previous prime is 138856163629. The next prime is 138856163669. The reversal of 138856163645 is 546361658831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138856163645 - 2⁴ = 138856163629 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 491639 + ... + 720708.

It is an arithmetic number, because the mean of its divisors is an integer number (20829350988).

Almost surely, 2^138856163645 is an apocalyptic number.

It is an amenable number.

138856163645 is a deficient number, since it is larger than the sum of its proper divisors (27778644259).

138856163645 is a wasteful number, since it uses less digits than its factorization.

138856163645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235259.

The product of its digits is 12441600, while the sum is 56.

The spelling of 138856163645 in words is "one hundred thirty-eight billion, eight hundred fifty-six million, one hundred sixty-three thousand, six hundred forty-five".