204148168891 has 2 divisors, whose sum is σ = 204148168892. Its totient is φ = 204148168890.

The previous prime is 204148168813. The next prime is 204148168909. The reversal of 204148168891 is 198861841402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204148168891 - 2³⁵ = 169788430523 is a prime.

It is not a weakly prime, because it can be changed into another prime (204148168391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102074084445 + 102074084446.

It is an arithmetic number, because the mean of its divisors is an integer number (102074084446).

Almost surely, 2^204148168891 is an apocalyptic number.

204148168891 is a deficient number, since it is larger than the sum of its proper divisors (1).

204148168891 is an equidigital number, since it uses as much as digits as its factorization.

204148168891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 884736, while the sum is 52.

The spelling of 204148168891 in words is "two hundred four billion, one hundred forty-eight million, one hundred sixty-eight thousand, eight hundred ninety-one".