1627923349781 has 2 divisors, whose sum is σ = 1627923349782. Its totient is φ = 1627923349780.

The previous prime is 1627923349721. The next prime is 1627923349783. The reversal of 1627923349781 is 1879433297261.

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., 1605732480625 + 22190869156 = 1267175^2 + 148966^2 .

It is a cyclic number.

It is not a de Polignac number, because 1627923349781 - 2¹⁰ = 1627923348757 is a prime.

It is a super-2 number, since 2×1627923349781² (a number of 25 digits) contains 22 as substring.

Together with 1627923349783, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1627923349783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 813961674890 + 813961674891.

It is an arithmetic number, because the mean of its divisors is an integer number (813961674891).

Almost surely, 2^{1627923349781} is an apocalyptic number.

It is an amenable number.

1627923349781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1627923349781 is an equidigital number, since it uses as much as digits as its factorization.

1627923349781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27433728, while the sum is 62.

The spelling of 1627923349781 in words is "one trillion, six hundred twenty-seven billion, nine hundred twenty-three million, three hundred forty-nine thousand, seven hundred eighty-one".