1663021546161 has 8 divisors (see below), whose sum is σ = 2347795124064. Its totient is φ = 1043464499520.

The previous prime is 1663021546141. The next prime is 1663021546171. The reversal of 1663021546161 is 1616451203661.

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

It is not a de Polignac number, because 1663021546161 - 2¹⁴ = 1663021529777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1663021546141) 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 7 ways as a sum of consecutive naturals, for example, 16304132755 + ... + 16304132856.

It is an arithmetic number, because the mean of its divisors is an integer number (293474390508).

Almost surely, 2^{1663021546161} is an apocalyptic number.

It is an amenable number.

1663021546161 is a deficient number, since it is larger than the sum of its proper divisors (684773577903).

1663021546161 is a wasteful number, since it uses less digits than its factorization.

1663021546161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32608265631.

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 1663021546161 in words is "one trillion, six hundred sixty-three billion, twenty-one million, five hundred forty-six thousand, one hundred sixty-one".