1555264971643 has 2 divisors, whose sum is σ = 1555264971644. Its totient is φ = 1555264971642.

The previous prime is 1555264971607. The next prime is 1555264971683. The reversal of 1555264971643 is 3461794625551.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1555264971643 is a prime.

It is not a weakly prime, because it can be changed into another prime (1555264971683) 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, 777632485821 + 777632485822.

It is an arithmetic number, because the mean of its divisors is an integer number (777632485822).

Almost surely, 2^{1555264971643} is an apocalyptic number.

1555264971643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1555264971643 is an equidigital number, since it uses as much as digits as its factorization.

1555264971643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216000, while the sum is 58.

The spelling of 1555264971643 in words is "one trillion, five hundred fifty-five billion, two hundred sixty-four million, nine hundred seventy-one thousand, six hundred forty-three".