28032780253055 has 8 divisors (see below), whose sum is σ = 33639470798544. Its totient is φ = 22426134539200.

The previous prime is 28032780252947. The next prime is 28032780253067. The reversal of 28032780253055 is 55035208723082.

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

It is not a de Polignac number, because 28032780253055 - 2¹⁶ = 28032780187519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28032780252994 and 28032780253012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9816566 + ... + 12346275.

It is an arithmetic number, because the mean of its divisors is an integer number (4204933849818).

Almost surely, 2^{28032780253055} is an apocalyptic number.

28032780253055 is a deficient number, since it is larger than the sum of its proper divisors (5606690545489).

28032780253055 is a wasteful number, since it uses less digits than its factorization.

28032780253055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22415817.

The product of its (nonzero) digits is 4032000, while the sum is 50.

The spelling of 28032780253055 in words is "twenty-eight trillion, thirty-two billion, seven hundred eighty million, two hundred fifty-three thousand, fifty-five".