4251489866 has 16 divisors (see below), whose sum is σ = 6878209128. Its totient is φ = 1959249600.

The previous prime is 4251489811. The next prime is 4251489877. The reversal of 4251489866 is 6689841524.

It can be written as a sum of positive squares in 4 ways, for example, as 3205937641 + 1045552225 = 56621^2 + 32335^2 .

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 106505 + ... + 140876.

Almost surely, 2^4251489866 is an apocalyptic number.

4251489866 is a deficient number, since it is larger than the sum of its proper divisors (2626719262).

4251489866 is a wasteful number, since it uses less digits than its factorization.

4251489866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248057.

The product of its digits is 3317760, while the sum is 53.

The square root of 4251489866 is about 65203.4498013717. The cubic root of 4251489866 is about 1619.9951564657.

The spelling of 4251489866 in words is "four billion, two hundred fifty-one million, four hundred eighty-nine thousand, eight hundred sixty-six".