16563507273355 has 16 divisors (see below), whose sum is σ = 22739910137280. Its totient is φ = 11345712049152.

The previous prime is 16563507273323. The next prime is 16563507273359. The reversal of 16563507273355 is 55337270536561.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 16563507273355 - 2⁵ = 16563507273323 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16563507273355.

It is not an unprimeable number, because it can be changed into a prime (16563507273359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252498190 + ... + 252563779.

It is an arithmetic number, because the mean of its divisors is an integer number (1421244383580).

Almost surely, 2^{16563507273355} is an apocalyptic number.

16563507273355 is a deficient number, since it is larger than the sum of its proper divisors (6176402863925).

16563507273355 is an equidigital number, since it uses as much as digits as its factorization.

16563507273355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505062918.

The product of its (nonzero) digits is 59535000, while the sum is 58.

The spelling of 16563507273355 in words is "sixteen trillion, five hundred sixty-three billion, five hundred seven million, two hundred seventy-three thousand, three hundred fifty-five".