16563604234101 has 16 divisors (see below), whose sum is σ = 22447347557568. Its totient is φ = 10861139865600.

The previous prime is 16563604234087. The next prime is 16563604234139. The reversal of 16563604234101 is 10143240636561.

It is a happy number.

It is not a de Polignac number, because 16563604234101 - 2²⁹ = 16563067363189 is a prime.

It is a super-2 number, since 2×16563604234101² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16563604234181) 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, 7503006 + ... + 9456336.

It is an arithmetic number, because the mean of its divisors is an integer number (1402959222348).

Almost surely, 2^{16563604234101} is an apocalyptic number.

It is an amenable number.

16563604234101 is a deficient number, since it is larger than the sum of its proper divisors (5883743323467).

16563604234101 is a wasteful number, since it uses less digits than its factorization.

16563604234101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999732.

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 16563604234101 in words is "sixteen trillion, five hundred sixty-three billion, six hundred four million, two hundred thirty-four thousand, one hundred one".