1971748454399 has 2 divisors, whose sum is σ = 1971748454400. Its totient is φ = 1971748454398.

The previous prime is 1971748454371. The next prime is 1971748454419. The reversal of 1971748454399 is 9934548471791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1971748454399 - 2⁴⁰ = 872236826623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1971748654399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 985874227199 + 985874227200.

It is an arithmetic number, because the mean of its divisors is an integer number (985874227200).

Almost surely, 2^{1971748454399} is an apocalyptic number.

1971748454399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1971748454399 is an equidigital number, since it uses as much as digits as its factorization.

1971748454399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 274337280, while the sum is 71.

The spelling of 1971748454399 in words is "one trillion, nine hundred seventy-one billion, seven hundred forty-eight million, four hundred fifty-four thousand, three hundred ninety-nine".