28341777564 has 18 divisors (see below), whose sum is σ = 71641715600. Its totient is φ = 9447259176.

The previous prime is 28341777509. The next prime is 28341777599. The reversal of 28341777564 is 46577714382.

28341777564 is a `hidden beast` number, since 2 + 8 + 3 + 4 + 1 + 7 + 77 + 564 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 28341777564.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 393635764 + ... + 393635835.

Almost surely, 2^28341777564 is an apocalyptic number.

It is an amenable number.

28341777564 is an abundant number, since it is smaller than the sum of its proper divisors (43299938036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28341777564 is a wasteful number, since it uses less digits than its factorization.

28341777564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787271609 (or 787271604 counting only the distinct ones).

The product of its digits is 7902720, while the sum is 54.

The spelling of 28341777564 in words is "twenty-eight billion, three hundred forty-one million, seven hundred seventy-seven thousand, five hundred sixty-four".