28576671691 has 2 divisors, whose sum is σ = 28576671692. Its totient is φ = 28576671690.

The previous prime is 28576671671. The next prime is 28576671719. The reversal of 28576671691 is 19617667582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28576671691 - 2¹⁹ = 28576147403 is a prime.

It is not a weakly prime, because it can be changed into another prime (28576671661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14288335845 + 14288335846.

It is an arithmetic number, because the mean of its divisors is an integer number (14288335846).

Almost surely, 2^28576671691 is an apocalyptic number.

28576671691 is a deficient number, since it is larger than the sum of its proper divisors (1).

28576671691 is an equidigital number, since it uses as much as digits as its factorization.

28576671691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7620480, while the sum is 58.

The spelling of 28576671691 in words is "twenty-eight billion, five hundred seventy-six million, six hundred seventy-one thousand, six hundred ninety-one".