28001533606563 has 16 divisors (see below), whose sum is σ = 40729899830400. Its totient is φ = 16970461260480.

The previous prime is 28001533606457. The next prime is 28001533606589. The reversal of 28001533606563 is 36560633510082.

It is not a de Polignac number, because 28001533606563 - 2²⁴ = 28001516829347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28001533656563) 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, 643218 + ... + 7511111.

It is an arithmetic number, because the mean of its divisors is an integer number (2545618739400).

Almost surely, 2^{28001533606563} is an apocalyptic number.

28001533606563 is a deficient number, since it is larger than the sum of its proper divisors (12728366223837).

28001533606563 is a wasteful number, since it uses less digits than its factorization.

28001533606563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8258402.

The product of its (nonzero) digits is 2332800, while the sum is 48.

The spelling of 28001533606563 in words is "twenty-eight trillion, one billion, five hundred thirty-three million, six hundred six thousand, five hundred sixty-three".