191281628833417 has 2 divisors, whose sum is σ = 191281628833418. Its totient is φ = 191281628833416.

The previous prime is 191281628833277. The next prime is 191281628833433. The reversal of 191281628833417 is 714338826182191.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139450686037776 + 51830942795641 = 11808924^2 + 7199371^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191281628833417 is a prime.

It is not a weakly prime, because it can be changed into another prime (191281628833447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95640814416708 + 95640814416709.

It is an arithmetic number, because the mean of its divisors is an integer number (95640814416709).

Almost surely, 2^{191281628833417} is an apocalyptic number.

It is an amenable number.

191281628833417 is a deficient number, since it is larger than the sum of its proper divisors (1).

191281628833417 is an equidigital number, since it uses as much as digits as its factorization.

191281628833417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27869184, while the sum is 64.

The spelling of 191281628833417 in words is "one hundred ninety-one trillion, two hundred eighty-one billion, six hundred twenty-eight million, eight hundred thirty-three thousand, four hundred seventeen".