17645047699121 has 2 divisors, whose sum is σ = 17645047699122. Its totient is φ = 17645047699120.

The previous prime is 17645047699051. The next prime is 17645047699127. The reversal of 17645047699121 is 12199674054671.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17637816067600 + 7231631521 = 4199740^2 + 85039^2 .

It is an emirp because it is prime and its reverse (12199674054671) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17645047699121 - 2²² = 17645043504817 is a prime.

It is a super-2 number, since 2×17645047699121² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (17645047699127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8822523849560 + 8822523849561.

It is an arithmetic number, because the mean of its divisors is an integer number (8822523849561).

Almost surely, 2^{17645047699121} is an apocalyptic number.

It is an amenable number.

17645047699121 is a deficient number, since it is larger than the sum of its proper divisors (1).

17645047699121 is an equidigital number, since it uses as much as digits as its factorization.

17645047699121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22861440, while the sum is 62.

The spelling of 17645047699121 in words is "seventeen trillion, six hundred forty-five billion, forty-seven million, six hundred ninety-nine thousand, one hundred twenty-one".