13139139230957 has 4 divisors (see below), whose sum is σ = 13139248479516. Its totient is φ = 13139029982400.

The previous prime is 13139139230953. The next prime is 13139139230977. The reversal of 13139139230957 is 75903293193131.

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 6290209464841 + 6848929766116 = 2508029^2 + 2617046^2 .

It is a cyclic number.

It is not a de Polignac number, because 13139139230957 - 2² = 13139139230953 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13139139230953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54443678 + ... + 54684479.

It is an arithmetic number, because the mean of its divisors is an integer number (3284812119879).

Almost surely, 2^{13139139230957} is an apocalyptic number.

It is an amenable number.

13139139230957 is a deficient number, since it is larger than the sum of its proper divisors (109248559).

13139139230957 is a wasteful number, since it uses less digits than its factorization.

13139139230957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109248558.

The product of its (nonzero) digits is 4133430, while the sum is 56.

The spelling of 13139139230957 in words is "thirteen trillion, one hundred thirty-nine billion, one hundred thirty-nine million, two hundred thirty thousand, nine hundred fifty-seven".