138677424776831 has 8 divisors (see below), whose sum is σ = 138896006444160. Its totient is φ = 138458852145432.

The previous prime is 138677424776789. The next prime is 138677424776833.

138677424776831 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138677424776831 is a prime.

It is a super-2 number, since 2×138677424776831² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138677424776833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28796006 + ... + 33265068.

It is an arithmetic number, because the mean of its divisors is an integer number (17362000805520).

Almost surely, 2^{138677424776831} is an apocalyptic number.

138677424776831 is a deficient number, since it is larger than the sum of its proper divisors (218581667329).

138677424776831 is an equidigital number, since it uses as much as digits as its factorization.

138677424776831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4517965.

The product of its digits is 1593188352, while the sum is 74.

The spelling of 138677424776831 in words is "one hundred thirty-eight trillion, six hundred seventy-seven billion, four hundred twenty-four million, seven hundred seventy-six thousand, eight hundred thirty-one".