8139166643329 has 4 divisors (see below), whose sum is σ = 8140234642900. Its totient is φ = 8138098643760.

The previous prime is 8139166643323. The next prime is 8139166643347. The reversal of 8139166643329 is 9233466619318.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3561342671104 + 4577823972225 = 1887152^2 + 2139585^2 .

It is a cyclic number.

It is not a de Polignac number, because 8139166643329 - 2²⁹ = 8138629772417 is a prime.

It is a super-2 number, since 2×8139166643329² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8139166643323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533988354 + ... + 534003595.

It is an arithmetic number, because the mean of its divisors is an integer number (2035058660725).

Almost surely, 2^{8139166643329} is an apocalyptic number.

It is an amenable number.

8139166643329 is a deficient number, since it is larger than the sum of its proper divisors (1067999571).

8139166643329 is a wasteful number, since it uses less digits than its factorization.

8139166643329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067999570.

The product of its digits is 30233088, while the sum is 61.

The spelling of 8139166643329 in words is "eight trillion, one hundred thirty-nine billion, one hundred sixty-six million, six hundred forty-three thousand, three hundred twenty-nine".