174745936681 has 2 divisors, whose sum is σ = 174745936682. Its totient is φ = 174745936680.

The previous prime is 174745936609. The next prime is 174745936693. The reversal of 174745936681 is 186639547471.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174507543081 + 238393600 = 417741^2 + 15440^2 .

It is a cyclic number.

It is not a de Polignac number, because 174745936681 - 2¹⁷ = 174745805609 is a prime.

It is a super-2 number, since 2×174745936681² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (174745936181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 87372968340 + 87372968341.

It is an arithmetic number, because the mean of its divisors is an integer number (87372968341).

Almost surely, 2^174745936681 is an apocalyptic number.

It is an amenable number.

174745936681 is a deficient number, since it is larger than the sum of its proper divisors (1).

174745936681 is an equidigital number, since it uses as much as digits as its factorization.

174745936681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30481920, while the sum is 61.

The spelling of 174745936681 in words is "one hundred seventy-four billion, seven hundred forty-five million, nine hundred thirty-six thousand, six hundred eighty-one".