28137276557381 has 2 divisors, whose sum is σ = 28137276557382. Its totient is φ = 28137276557380.

The previous prime is 28137276557339. The next prime is 28137276557393. The reversal of 28137276557381 is 18375567273182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25403515236100 + 2733761321281 = 5040190^2 + 1653409^2 .

It is a cyclic number.

It is not a de Polignac number, because 28137276557381 - 2³⁰ = 28136202815557 is a prime.

It is a super-2 number, since 2×28137276557381² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28137276557081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14068638278690 + 14068638278691.

It is an arithmetic number, because the mean of its divisors is an integer number (14068638278691).

Almost surely, 2^{28137276557381} is an apocalyptic number.

It is an amenable number.

28137276557381 is a deficient number, since it is larger than the sum of its proper divisors (1).

28137276557381 is an equidigital number, since it uses as much as digits as its factorization.

28137276557381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 118540800, while the sum is 65.

The spelling of 28137276557381 in words is "twenty-eight trillion, one hundred thirty-seven billion, two hundred seventy-six million, five hundred fifty-seven thousand, three hundred eighty-one".