1271257056463 has 4 divisors (see below), whose sum is σ = 1271348521128. Its totient is φ = 1271165591800.

The previous prime is 1271257056449. The next prime is 1271257056473. The reversal of 1271257056463 is 3646507521721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1271257056463 - 2⁹ = 1271257055951 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271257056403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45711481 + ... + 45739282.

It is an arithmetic number, because the mean of its divisors is an integer number (317837130282).

Almost surely, 2^{1271257056463} is an apocalyptic number.

1271257056463 is a deficient number, since it is larger than the sum of its proper divisors (91464665).

1271257056463 is an equidigital number, since it uses as much as digits as its factorization.

1271257056463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91464664.

The product of its (nonzero) digits is 2116800, while the sum is 49.

The spelling of 1271257056463 in words is "one trillion, two hundred seventy-one billion, two hundred fifty-seven million, fifty-six thousand, four hundred sixty-three".