28775065552 has 20 divisors (see below), whose sum is σ = 55757403396. Its totient is φ = 14386058240.

The previous prime is 28775065541. The next prime is 28775065573. The reversal of 28775065552 is 25556057782.

It can be written as a sum of positive squares in 2 ways, for example, as 8193146256 + 20581919296 = 90516^2 + 143464^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28775065552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78402 + ... + 252382.

Almost surely, 2^28775065552 is an apocalyptic number.

It is an amenable number.

28775065552 is a deficient number, since it is larger than the sum of its proper divisors (26982337844).

28775065552 is a wasteful number, since it uses less digits than its factorization.

28775065552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184326 (or 184320 counting only the distinct ones).

The product of its (nonzero) digits is 5880000, while the sum is 52.

The spelling of 28775065552 in words is "twenty-eight billion, seven hundred seventy-five million, sixty-five thousand, five hundred fifty-two".