13378539157 has 2 divisors, whose sum is σ = 13378539158. Its totient is φ = 13378539156.

The previous prime is 13378539133. The next prime is 13378539169. The reversal of 13378539157 is 75193587331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12509527716 + 869011441 = 111846^2 + 29479^2 .

It is an emirp because it is prime and its reverse (75193587331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13378539157 - 2¹⁹ = 13378014869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13378539197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6689269578 + 6689269579.

It is an arithmetic number, because the mean of its divisors is an integer number (6689269579).

Almost surely, 2^13378539157 is an apocalyptic number.

It is an amenable number.

13378539157 is a deficient number, since it is larger than the sum of its proper divisors (1).

13378539157 is an equidigital number, since it uses as much as digits as its factorization.

13378539157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2381400, while the sum is 52.

The spelling of 13378539157 in words is "thirteen billion, three hundred seventy-eight million, five hundred thirty-nine thousand, one hundred fifty-seven".