28343515655 has 48 divisors (see below), whose sum is σ = 42671422080. Its totient is φ = 17914111488.

The previous prime is 28343515643. The next prime is 28343515657. The reversal of 28343515655 is 55651534382.

It is a happy number.

It is not a de Polignac number, because 28343515655 - 2¹⁰ = 28343514631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28343515657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2283827 + ... + 2296203.

It is an arithmetic number, because the mean of its divisors is an integer number (888987960).

Almost surely, 2^28343515655 is an apocalyptic number.

28343515655 is a deficient number, since it is larger than the sum of its proper divisors (14327906425).

28343515655 is a wasteful number, since it uses less digits than its factorization.

28343515655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13128 (or 13121 counting only the distinct ones).

The product of its digits is 2160000, while the sum is 47.

The spelling of 28343515655 in words is "twenty-eight billion, three hundred forty-three million, five hundred fifteen thousand, six hundred fifty-five".