641625707526173 has 2 divisors, whose sum is σ = 641625707526174. Its totient is φ = 641625707526172.

The previous prime is 641625707526157. The next prime is 641625707526217. The reversal of 641625707526173 is 371625707526146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 380013618747844 + 261612088778329 = 19493938^2 + 16174427^2 .

It is a cyclic number.

It is not a de Polignac number, because 641625707526173 - 2⁴ = 641625707526157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641625707526103) 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 as a sum of consecutive naturals, namely, 320812853763086 + 320812853763087.

It is an arithmetic number, because the mean of its divisors is an integer number (320812853763087).

Almost surely, 2^{641625707526173} is an apocalyptic number.

It is an amenable number.

641625707526173 is a deficient number, since it is larger than the sum of its proper divisors (1).

641625707526173 is an equidigital number, since it uses as much as digits as its factorization.

641625707526173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 88905600, while the sum is 62.

The spelling of 641625707526173 in words is "six hundred forty-one trillion, six hundred twenty-five billion, seven hundred seven million, five hundred twenty-six thousand, one hundred seventy-three".