1281899218463 has 2 divisors, whose sum is σ = 1281899218464. Its totient is φ = 1281899218462.

The previous prime is 1281899218403. The next prime is 1281899218583. The reversal of 1281899218463 is 3648129981821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1281899218463 - 2¹⁸ = 1281898956319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1281899218396 and 1281899218405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1281899218403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640949609231 + 640949609232.

It is an arithmetic number, because the mean of its divisors is an integer number (640949609232).

Almost surely, 2^{1281899218463} is an apocalyptic number.

1281899218463 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281899218463 is an equidigital number, since it uses as much as digits as its factorization.

1281899218463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11943936, while the sum is 62.

The spelling of 1281899218463 in words is "one trillion, two hundred eighty-one billion, eight hundred ninety-nine million, two hundred eighteen thousand, four hundred sixty-three".