641032541161 has 2 divisors, whose sum is σ = 641032541162. Its totient is φ = 641032541160.

The previous prime is 641032541117. The next prime is 641032541179. The reversal of 641032541161 is 161145230146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 636874225936 + 4158315225 = 798044^2 + 64485^2 .

It is a cyclic number.

It is not a de Polignac number, because 641032541161 - 2⁷ = 641032541033 is a prime.

It is not a weakly prime, because it can be changed into another prime (641032541111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320516270580 + 320516270581.

It is an arithmetic number, because the mean of its divisors is an integer number (320516270581).

Almost surely, 2^641032541161 is an apocalyptic number.

It is an amenable number.

641032541161 is a deficient number, since it is larger than the sum of its proper divisors (1).

641032541161 is an equidigital number, since it uses as much as digits as its factorization.

641032541161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The spelling of 641032541161 in words is "six hundred forty-one billion, thirty-two million, five hundred forty-one thousand, one hundred sixty-one".