1153220221768 has 32 divisors (see below), whose sum is σ = 2179353771000. Its totient is φ = 572068297728.

The previous prime is 1153220221763. The next prime is 1153220221817. The reversal of 1153220221768 is 8671220223511.

It can be written as a sum of positive squares in 4 ways, for example, as 630147017124 + 523073204644 = 793818^2 + 723238^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1153220221768.

It is not an unprimeable number, because it can be changed into a prime (1153220221763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 449680 + ... + 1583872.

Almost surely, 2^{1153220221768} is an apocalyptic number.

It is an amenable number.

1153220221768 is a deficient number, since it is larger than the sum of its proper divisors (1026133549232).

1153220221768 is a wasteful number, since it uses less digits than its factorization.

1153220221768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135201 (or 1135197 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 1153220221768 in words is "one trillion, one hundred fifty-three billion, two hundred twenty million, two hundred twenty-one thousand, seven hundred sixty-eight".