1663236223273 has 8 divisors (see below), whose sum is σ = 1703821822920. Its totient is φ = 1622651521920.

The previous prime is 1663236223237. The next prime is 1663236223291. The reversal of 1663236223273 is 3723226323661.

It can be written as a sum of positive squares in 4 ways, for example, as 369757637929 + 1293478585344 = 608077^2 + 1137312^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1663236223273 - 2⁹ = 1663236222761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1663236223573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4974111 + ... + 5297947.

It is an arithmetic number, because the mean of its divisors is an integer number (212977727865).

Almost surely, 2^{1663236223273} is an apocalyptic number.

It is an amenable number.

1663236223273 is a deficient number, since it is larger than the sum of its proper divisors (40585599647).

1663236223273 is a wasteful number, since it uses less digits than its factorization.

1663236223273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449147.

The product of its digits is 1959552, while the sum is 46.

The spelling of 1663236223273 in words is "one trillion, six hundred sixty-three billion, two hundred thirty-six million, two hundred twenty-three thousand, two hundred seventy-three".