1351613621663 has 2 divisors, whose sum is σ = 1351613621664. Its totient is φ = 1351613621662.

The previous prime is 1351613621539. The next prime is 1351613621707. The reversal of 1351613621663 is 3661263161531.

It is an a-pointer prime, because the next prime (1351613621707) can be obtained adding 1351613621663 to its sum of digits (44).

It is a strong prime.

It is an emirp because it is prime and its reverse (3661263161531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1351613621663 - 2²² = 1351609427359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1351613621063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 675806810831 + 675806810832.

It is an arithmetic number, because the mean of its divisors is an integer number (675806810832).

Almost surely, 2^{1351613621663} is an apocalyptic number.

1351613621663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1351613621663 is an equidigital number, since it uses as much as digits as its factorization.

1351613621663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 44.

The spelling of 1351613621663 in words is "one trillion, three hundred fifty-one billion, six hundred thirteen million, six hundred twenty-one thousand, six hundred sixty-three".