6151168781 has 2 divisors, whose sum is σ = 6151168782. Its totient is φ = 6151168780.

The previous prime is 6151168739. The next prime is 6151168811. The reversal of 6151168781 is 1878611516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4940824681 + 1210344100 = 70291^2 + 34790^2 .

It is a cyclic number.

It is not a de Polignac number, because 6151168781 - 2¹⁸ = 6150906637 is a prime.

It is a super-2 number, since 2×6151168781² = 75673754744698051922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6151168481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3075584390 + 3075584391.

It is an arithmetic number, because the mean of its divisors is an integer number (3075584391).

Almost surely, 2^6151168781 is an apocalyptic number.

It is an amenable number.

6151168781 is a deficient number, since it is larger than the sum of its proper divisors (1).

6151168781 is an equidigital number, since it uses as much as digits as its factorization.

6151168781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 44.

The square root of 6151168781 is about 78429.3872282578. The cubic root of 6151168781 is about 1832.2548554577.

The spelling of 6151168781 in words is "six billion, one hundred fifty-one million, one hundred sixty-eight thousand, seven hundred eighty-one".