1270748065649 has 2 divisors, whose sum is σ = 1270748065650. Its totient is φ = 1270748065648.

The previous prime is 1270748065633. The next prime is 1270748065651. The reversal of 1270748065649 is 9465608470721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1185772900624 + 84975165025 = 1088932^2 + 291505^2 .

It is a cyclic number.

It is not a de Polignac number, because 1270748065649 - 2⁴ = 1270748065633 is a prime.

It is a super-2 number, since 2×1270748065649² (a number of 25 digits) contains 22 as substring.

Together with 1270748065651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1270748025649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635374032824 + 635374032825.

It is an arithmetic number, because the mean of its divisors is an integer number (635374032825).

Almost surely, 2^{1270748065649} is an apocalyptic number.

It is an amenable number.

1270748065649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1270748065649 is an equidigital number, since it uses as much as digits as its factorization.

1270748065649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20321280, while the sum is 59.

The spelling of 1270748065649 in words is "one trillion, two hundred seventy billion, seven hundred forty-eight million, sixty-five thousand, six hundred forty-nine".