641274272117 has 2 divisors, whose sum is σ = 641274272118. Its totient is φ = 641274272116.

The previous prime is 641274272099. The next prime is 641274272123. The reversal of 641274272117 is 711272472146.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 342241380196 + 299032891921 = 585014^2 + 546839^2 .

It is a cyclic number.

It is not a de Polignac number, because 641274272117 - 2¹⁰ = 641274271093 is a prime.

It is a super-2 number, since 2×641274272117² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641274272417) 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, 320637136058 + 320637136059.

It is an arithmetic number, because the mean of its divisors is an integer number (320637136059).

Almost surely, 2^641274272117 is an apocalyptic number.

It is an amenable number.

641274272117 is a deficient number, since it is larger than the sum of its proper divisors (1).

641274272117 is an equidigital number, since it uses as much as digits as its factorization.

641274272117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 263424, while the sum is 44.

The spelling of 641274272117 in words is "six hundred forty-one billion, two hundred seventy-four million, two hundred seventy-two thousand, one hundred seventeen".