28827780655 has 8 divisors (see below), whose sum is σ = 34949969712. Its totient is φ = 22824469248.

The previous prime is 28827780613. The next prime is 28827780701. The reversal of 28827780655 is 55608772882.

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 28827780655 - 2¹⁷ = 28827649583 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28827780655.

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 7 ways as a sum of consecutive naturals, for example, 29718877 + ... + 29719846.

It is an arithmetic number, because the mean of its divisors is an integer number (4368746214).

Almost surely, 2^28827780655 is an apocalyptic number.

28827780655 is a deficient number, since it is larger than the sum of its proper divisors (6122189057).

28827780655 is an equidigital number, since it uses as much as digits as its factorization.

28827780655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59438825.

The product of its (nonzero) digits is 15052800, while the sum is 58.

The spelling of 28827780655 in words is "twenty-eight billion, eight hundred twenty-seven million, seven hundred eighty thousand, six hundred fifty-five".