28639478094523 has 2 divisors, whose sum is σ = 28639478094524. Its totient is φ = 28639478094522.

The previous prime is 28639478094443. The next prime is 28639478094529. The reversal of 28639478094523 is 32549087493682.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28639478094523 is a prime.

It is not a weakly prime, because it can be changed into another prime (28639478094529) 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, 14319739047261 + 14319739047262.

It is an arithmetic number, because the mean of its divisors is an integer number (14319739047262).

Almost surely, 2^{28639478094523} is an apocalyptic number.

28639478094523 is a deficient number, since it is larger than the sum of its proper divisors (1).

28639478094523 is an equidigital number, since it uses as much as digits as its factorization.

28639478094523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 627056640, while the sum is 70.

The spelling of 28639478094523 in words is "twenty-eight trillion, six hundred thirty-nine billion, four hundred seventy-eight million, ninety-four thousand, five hundred twenty-three".