675649789191691 has 2 divisors, whose sum is σ = 675649789191692. Its totient is φ = 675649789191690.

The previous prime is 675649789191679. The next prime is 675649789191709. The reversal of 675649789191691 is 196191987946576.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 675649789191691 - 2⁷ = 675649789191563 is a prime.

It is not a weakly prime, because it can be changed into another prime (675649759191691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337824894595845 + 337824894595846.

It is an arithmetic number, because the mean of its divisors is an integer number (337824894595846).

Almost surely, 2^{675649789191691} is an apocalyptic number.

675649789191691 is a deficient number, since it is larger than the sum of its proper divisors (1).

675649789191691 is an equidigital number, since it uses as much as digits as its factorization.

675649789191691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11110659840, while the sum is 88.

The spelling of 675649789191691 in words is "six hundred seventy-five trillion, six hundred forty-nine billion, seven hundred eighty-nine million, one hundred ninety-one thousand, six hundred ninety-one".