4245221768 has 8 divisors (see below), whose sum is σ = 7959790830. Its totient is φ = 2122610880.

The previous prime is 4245221707. The next prime is 4245221789. The reversal of 4245221768 is 8671225424.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2796505924 + 1448715844 = 52882^2 + 38062^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265326353 + ... + 265326368.

Almost surely, 2^4245221768 is an apocalyptic number.

It is an amenable number.

4245221768 is a deficient number, since it is larger than the sum of its proper divisors (3714569062).

4245221768 is a wasteful number, since it uses less digits than its factorization.

4245221768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530652727 (or 530652723 counting only the distinct ones).

The product of its digits is 215040, while the sum is 41.

The square root of 4245221768 is about 65155.3663791403. The cubic root of 4245221768 is about 1619.1986292037.

The spelling of 4245221768 in words is "four billion, two hundred forty-five million, two hundred twenty-one thousand, seven hundred sixty-eight".