4178911120981 has 2 divisors, whose sum is σ = 4178911120982. Its totient is φ = 4178911120980.

The previous prime is 4178911120913. The next prime is 4178911121027. The reversal of 4178911120981 is 1890211198714.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3735000738225 + 443910382756 = 1932615^2 + 666266^2 .

It is a cyclic number.

It is not a de Polignac number, because 4178911120981 - 2³⁵ = 4144551382613 is a prime.

It is a super-2 number, since 2×4178911120981² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4178911120781) 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, 2089455560490 + 2089455560491.

It is an arithmetic number, because the mean of its divisors is an integer number (2089455560491).

Almost surely, 2^{4178911120981} is an apocalyptic number.

It is an amenable number.

4178911120981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4178911120981 is an equidigital number, since it uses as much as digits as its factorization.

4178911120981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 52.

The spelling of 4178911120981 in words is "four trillion, one hundred seventy-eight billion, nine hundred eleven million, one hundred twenty thousand, nine hundred eighty-one".