16563401355423 has 64 divisors (see below), whose sum is σ = 24179559505920. Its totient is φ = 10024364832768.

The previous prime is 16563401355419. The next prime is 16563401355511. The reversal of 16563401355423 is 32455310436561.

It is not a de Polignac number, because 16563401355423 - 2² = 16563401355419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16563401356423) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 946633611 + ... + 946651107.

It is an arithmetic number, because the mean of its divisors is an integer number (377805617280).

Almost surely, 2^{16563401355423} is an apocalyptic number.

16563401355423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

16563401355423 is a deficient number, since it is larger than the sum of its proper divisors (7616158150497).

16563401355423 is a wasteful number, since it uses less digits than its factorization.

16563401355423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19048.

The product of its (nonzero) digits is 3888000, while the sum is 48.

The spelling of 16563401355423 in words is "sixteen trillion, five hundred sixty-three billion, four hundred one million, three hundred fifty-five thousand, four hundred twenty-three".