1281552427747 has 2 divisors, whose sum is σ = 1281552427748. Its totient is φ = 1281552427746.

The previous prime is 1281552427709. The next prime is 1281552427777. The reversal of 1281552427747 is 7477242551821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1281552427747 - 2²⁷ = 1281418210019 is a prime.

It is not a weakly prime, because it can be changed into another prime (1281552427777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640776213873 + 640776213874.

It is an arithmetic number, because the mean of its divisors is an integer number (640776213874).

Almost surely, 2^{1281552427747} is an apocalyptic number.

1281552427747 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281552427747 is an equidigital number, since it uses as much as digits as its factorization.

1281552427747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8780800, while the sum is 55.

The spelling of 1281552427747 in words is "one trillion, two hundred eighty-one billion, five hundred fifty-two million, four hundred twenty-seven thousand, seven hundred forty-seven".