1663120628519 has 16 divisors (see below), whose sum is σ = 2019942014976. Its totient is φ = 1336726281600.

The previous prime is 1663120628509. The next prime is 1663120628531. The reversal of 1663120628519 is 9158260213661.

It is a cyclic number.

It is not a de Polignac number, because 1663120628519 - 2⁴⁰ = 563609000743 is a prime.

It is a super-2 number, since 2×1663120628519² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663120628509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25753367 + ... + 25817864.

It is an arithmetic number, because the mean of its divisors is an integer number (126246375936).

Almost surely, 2^{1663120628519} is an apocalyptic number.

1663120628519 is a deficient number, since it is larger than the sum of its proper divisors (356821386457).

1663120628519 is a wasteful number, since it uses less digits than its factorization.

1663120628519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51571526.

The product of its (nonzero) digits is 933120, while the sum is 50.

The spelling of 1663120628519 in words is "one trillion, six hundred sixty-three billion, one hundred twenty million, six hundred twenty-eight thousand, five hundred nineteen".