1663120628499 has 32 divisors (see below), whose sum is σ = 2452414293504. Its totient is φ = 994066663680.

The previous prime is 1663120628473. The next prime is 1663120628509. The reversal of 1663120628499 is 9948260213661.

It is not a de Polignac number, because 1663120628499 - 2⁸ = 1663120628243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1663120628419) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50300257 + ... + 50333309.

It is an arithmetic number, because the mean of its divisors is an integer number (76637946672).

Almost surely, 2^{1663120628499} is an apocalyptic number.

1663120628499 is a deficient number, since it is larger than the sum of its proper divisors (789293665005).

1663120628499 is a wasteful number, since it uses less digits than its factorization.

1663120628499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54027.

The product of its (nonzero) digits is 6718464, while the sum is 57.

The spelling of 1663120628499 in words is "one trillion, six hundred sixty-three billion, one hundred twenty million, six hundred twenty-eight thousand, four hundred ninety-nine".