1271375658147 has 54 divisors (see below), whose sum is σ = 1991955082572. Its totient is φ = 719196234624.

The previous prime is 1271375658109. The next prime is 1271375658149. The reversal of 1271375658147 is 7418565731721.

It is a happy number.

It is not a de Polignac number, because 1271375658147 - 2¹¹ = 1271375656099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1271375658149) 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 in 53 ways as a sum of consecutive naturals, for example, 1544805978 + ... + 1544806800.

Almost surely, 2^{1271375658147} is an apocalyptic number.

1271375658147 is a deficient number, since it is larger than the sum of its proper divisors (720579424425).

1271375658147 is an frugal number, since it uses more digits than its factorization.

1271375658147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1889 (or 946 counting only the distinct ones).

The product of its digits is 9878400, while the sum is 57.

The spelling of 1271375658147 in words is "one trillion, two hundred seventy-one billion, three hundred seventy-five million, six hundred fifty-eight thousand, one hundred forty-seven".