1020144865633 has 4 divisors (see below), whose sum is σ = 1020811193008. Its totient is φ = 1019478538260.

The previous prime is 1020144865609. The next prime is 1020144865679. The reversal of 1020144865633 is 3365684410201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020144865633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1020144865633.

It is not an unprimeable number, because it can be changed into a prime (1020144865603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333161391 + ... + 333164452.

It is an arithmetic number, because the mean of its divisors is an integer number (255202798252).

Almost surely, 2^{1020144865633} is an apocalyptic number.

It is an amenable number.

1020144865633 is a deficient number, since it is larger than the sum of its proper divisors (666327375).

1020144865633 is an equidigital number, since it uses as much as digits as its factorization.

1020144865633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666327374.

The product of its (nonzero) digits is 414720, while the sum is 43.

The spelling of 1020144865633 in words is "one trillion, twenty billion, one hundred forty-four million, eight hundred sixty-five thousand, six hundred thirty-three".