1663120628473 has 2 divisors, whose sum is σ = 1663120628474. Its totient is φ = 1663120628472.

The previous prime is 1663120628459. The next prime is 1663120628509. The reversal of 1663120628473 is 3748260213661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1498599533929 + 164521094544 = 1224173^2 + 405612^2 .

It is a cyclic number.

It is not a de Polignac number, because 1663120628473 - 2⁵ = 1663120628441 is a prime.

It is not a weakly prime, because it can be changed into another prime (1663120628573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831560314236 + 831560314237.

It is an arithmetic number, because the mean of its divisors is an integer number (831560314237).

Almost surely, 2^{1663120628473} is an apocalyptic number.

It is an amenable number.

1663120628473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663120628473 is an equidigital number, since it uses as much as digits as its factorization.

1663120628473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1741824, while the sum is 49.

The spelling of 1663120628473 in words is "one trillion, six hundred sixty-three billion, one hundred twenty million, six hundred twenty-eight thousand, four hundred seventy-three".