7994060101681 has 2 divisors, whose sum is σ = 7994060101682. Its totient is φ = 7994060101680.

The previous prime is 7994060101673. The next prime is 7994060101847. The reversal of 7994060101681 is 1861010604997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5826628373281 + 2167431728400 = 2413841^2 + 1472220^2 .

It is a cyclic number.

It is not a de Polignac number, because 7994060101681 - 2³ = 7994060101673 is a prime.

It is a super-2 number, since 2×7994060101681² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7994060101081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3997030050840 + 3997030050841.

It is an arithmetic number, because the mean of its divisors is an integer number (3997030050841).

Almost surely, 2^{7994060101681} is an apocalyptic number.

It is an amenable number.

7994060101681 is a deficient number, since it is larger than the sum of its proper divisors (1).

7994060101681 is an equidigital number, since it uses as much as digits as its factorization.

7994060101681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 52.

The spelling of 7994060101681 in words is "seven trillion, nine hundred ninety-four billion, sixty million, one hundred one thousand, six hundred eighty-one".