1628193995291 has 2 divisors, whose sum is σ = 1628193995292. Its totient is φ = 1628193995290.

The previous prime is 1628193995261. The next prime is 1628193995293. The reversal of 1628193995291 is 1925993918261.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1628193995291 - 2¹⁴ = 1628193978907 is a prime.

Together with 1628193995293, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1628193995293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 814096997645 + 814096997646.

It is an arithmetic number, because the mean of its divisors is an integer number (814096997646).

Almost surely, 2^{1628193995291} is an apocalyptic number.

1628193995291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1628193995291 is an equidigital number, since it uses as much as digits as its factorization.

1628193995291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18895680, while the sum is 65.

The spelling of 1628193995291 in words is "one trillion, six hundred twenty-eight billion, one hundred ninety-three million, nine hundred ninety-five thousand, two hundred ninety-one".