1271566553003 has 4 divisors (see below), whose sum is σ = 1272034215360. Its totient is φ = 1271098890648.

The previous prime is 1271566552979. The next prime is 1271566553011. The reversal of 1271566553003 is 3003556651721.

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 1271566553003 - 2¹⁴ = 1271566536619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1271566553053) 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, 233827100 + ... + 233832537.

It is an arithmetic number, because the mean of its divisors is an integer number (318008553840).

Almost surely, 2^{1271566553003} is an apocalyptic number.

1271566553003 is a deficient number, since it is larger than the sum of its proper divisors (467662357).

1271566553003 is an equidigital number, since it uses as much as digits as its factorization.

1271566553003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467662356.

The product of its (nonzero) digits is 567000, while the sum is 44.

The spelling of 1271566553003 in words is "one trillion, two hundred seventy-one billion, five hundred sixty-six million, five hundred fifty-three thousand, three".