172644174611641 has 2 divisors, whose sum is σ = 172644174611642. Its totient is φ = 172644174611640.

The previous prime is 172644174611593. The next prime is 172644174611677. The reversal of 172644174611641 is 146116471446271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163669932156025 + 8974242455616 = 12793355^2 + 2995704^2 .

It is a cyclic number.

It is not a de Polignac number, because 172644174611641 - 2¹³ = 172644174603449 is a prime.

It is a super-2 number, since 2×172644174611641² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (172644174611681) 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, 86322087305820 + 86322087305821.

It is an arithmetic number, because the mean of its divisors is an integer number (86322087305821).

Almost surely, 2^{172644174611641} is an apocalyptic number.

It is an amenable number.

172644174611641 is a deficient number, since it is larger than the sum of its proper divisors (1).

172644174611641 is an equidigital number, since it uses as much as digits as its factorization.

172644174611641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5419008, while the sum is 55.

The spelling of 172644174611641 in words is "one hundred seventy-two trillion, six hundred forty-four billion, one hundred seventy-four million, six hundred eleven thousand, six hundred forty-one".