4251168149 has 2 divisors, whose sum is σ = 4251168150. Its totient is φ = 4251168148.

The previous prime is 4251168143. The next prime is 4251168193. The reversal of 4251168149 is 9418611524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3171717124 + 1079451025 = 56318^2 + 32855^2 .

It is a cyclic number.

It is not a de Polignac number, because 4251168149 - 2⁴ = 4251168133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4251168143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2125584074 + 2125584075.

It is an arithmetic number, because the mean of its divisors is an integer number (2125584075).

Almost surely, 2^4251168149 is an apocalyptic number.

It is an amenable number.

4251168149 is a deficient number, since it is larger than the sum of its proper divisors (1).

4251168149 is an equidigital number, since it uses as much as digits as its factorization.

4251168149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 41.

The square root of 4251168149 is about 65200.9827303239. The cubic root of 4251168149 is about 1619.9542928983.

The spelling of 4251168149 in words is "four billion, two hundred fifty-one million, one hundred sixty-eight thousand, one hundred forty-nine".