138451136827 has 4 divisors (see below), whose sum is σ = 138451942360. Its totient is φ = 138450331296.

The previous prime is 138451136819. The next prime is 138451136851. The reversal of 138451136827 is 728631154831.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 138451136827 - 2³ = 138451136819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138451136867) 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 3 ways as a sum of consecutive naturals, for example, 29877 + ... + 527062.

It is an arithmetic number, because the mean of its divisors is an integer number (34612985590).

Almost surely, 2^138451136827 is an apocalyptic number.

138451136827 is a deficient number, since it is larger than the sum of its proper divisors (805533).

138451136827 is an equidigital number, since it uses as much as digits as its factorization.

138451136827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805532.

The product of its digits is 967680, while the sum is 49.

The spelling of 138451136827 in words is "one hundred thirty-eight billion, four hundred fifty-one million, one hundred thirty-six thousand, eight hundred twenty-seven".