28577752561 has 8 divisors (see below), whose sum is σ = 28622816000. Its totient is φ = 28532725200.

The previous prime is 28577752513. The next prime is 28577752673. The reversal of 28577752561 is 16525777582.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28577752561 - 2⁷ = 28577752433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28577752361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1872640 + ... + 1887838.

It is an arithmetic number, because the mean of its divisors is an integer number (3577852000).

Almost surely, 2^28577752561 is an apocalyptic number.

It is an amenable number.

28577752561 is a deficient number, since it is larger than the sum of its proper divisors (45063439).

28577752561 is a wasteful number, since it uses less digits than its factorization.

28577752561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18039.

The product of its digits is 8232000, while the sum is 55.

The spelling of 28577752561 in words is "twenty-eight billion, five hundred seventy-seven million, seven hundred fifty-two thousand, five hundred sixty-one".