1272002161663 has 2 divisors, whose sum is σ = 1272002161664. Its totient is φ = 1272002161662.

The previous prime is 1272002161657. The next prime is 1272002161687. The reversal of 1272002161663 is 3661612002721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1272002161663 - 2⁵ = 1272002161631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1272002161603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636001080831 + 636001080832.

It is an arithmetic number, because the mean of its divisors is an integer number (636001080832).

Almost surely, 2^{1272002161663} is an apocalyptic number.

1272002161663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272002161663 is an equidigital number, since it uses as much as digits as its factorization.

1272002161663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 1272002161663 in words is "one trillion, two hundred seventy-two billion, two million, one hundred sixty-one thousand, six hundred sixty-three".