28544540645 has 16 divisors (see below), whose sum is σ = 35473662720. Its totient is φ = 22023892800.

The previous prime is 28544540641. The next prime is 28544540653. The reversal of 28544540645 is 54604544582.

It is not a de Polignac number, because 28544540645 - 2² = 28544540641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28544540645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28544540641) 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, 24050 + ... + 240140.

It is an arithmetic number, because the mean of its divisors is an integer number (2217103920).

Almost surely, 2^28544540645 is an apocalyptic number.

It is an amenable number.

28544540645 is a deficient number, since it is larger than the sum of its proper divisors (6929122075).

28544540645 is a wasteful number, since it uses less digits than its factorization.

28544540645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217036.

The product of its (nonzero) digits is 3072000, while the sum is 47.

The spelling of 28544540645 in words is "twenty-eight billion, five hundred forty-four million, five hundred forty thousand, six hundred forty-five".