28146630691 has 2 divisors, whose sum is σ = 28146630692. Its totient is φ = 28146630690.

The previous prime is 28146630649. The next prime is 28146630727. The reversal of 28146630691 is 19603664182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28146630691 - 2⁹ = 28146630179 is a prime.

It is not a weakly prime, because it can be changed into another prime (28146630791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14073315345 + 14073315346.

It is an arithmetic number, because the mean of its divisors is an integer number (14073315346).

Almost surely, 2^28146630691 is an apocalyptic number.

28146630691 is a deficient number, since it is larger than the sum of its proper divisors (1).

28146630691 is an equidigital number, since it uses as much as digits as its factorization.

28146630691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 28146630691 in words is "twenty-eight billion, one hundred forty-six million, six hundred thirty thousand, six hundred ninety-one".