28136671477 has 2 divisors, whose sum is σ = 28136671478. Its totient is φ = 28136671476.

The previous prime is 28136671427. The next prime is 28136671481. The reversal of 28136671477 is 77417663182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27326073636 + 810597841 = 165306^2 + 28471^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28136671477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28136671427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14068335738 + 14068335739.

It is an arithmetic number, because the mean of its divisors is an integer number (14068335739).

Almost surely, 2^28136671477 is an apocalyptic number.

It is an amenable number.

28136671477 is a deficient number, since it is larger than the sum of its proper divisors (1).

28136671477 is an equidigital number, since it uses as much as digits as its factorization.

28136671477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2370816, while the sum is 52.

The spelling of 28136671477 in words is "twenty-eight billion, one hundred thirty-six million, six hundred seventy-one thousand, four hundred seventy-seven".