2174172214561 has 2 divisors, whose sum is σ = 2174172214562. Its totient is φ = 2174172214560.

The previous prime is 2174172214549. The next prime is 2174172214601. The reversal of 2174172214561 is 1654122714712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1392680854161 + 781491360400 = 1180119^2 + 884020^2 .

It is a cyclic number.

It is not a de Polignac number, because 2174172214561 - 2⁷ = 2174172214433 is a prime.

It is not a weakly prime, because it can be changed into another prime (2174172214861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1087086107280 + 1087086107281.

It is an arithmetic number, because the mean of its divisors is an integer number (1087086107281).

Almost surely, 2^{2174172214561} is an apocalyptic number.

It is an amenable number.

2174172214561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2174172214561 is an equidigital number, since it uses as much as digits as its factorization.

2174172214561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188160, while the sum is 43.

The spelling of 2174172214561 in words is "two trillion, one hundred seventy-four billion, one hundred seventy-two million, two hundred fourteen thousand, five hundred sixty-one".