28101784955 has 4 divisors (see below), whose sum is σ = 33722141952. Its totient is φ = 22481427960.

The previous prime is 28101784903. The next prime is 28101784961. The reversal of 28101784955 is 55948710182.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28101784955 - 2⁶ = 28101784891 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2810178491 + ... + 2810178500.

It is an arithmetic number, because the mean of its divisors is an integer number (8430535488).

Almost surely, 2^28101784955 is an apocalyptic number.

28101784955 is a deficient number, since it is larger than the sum of its proper divisors (5620356997).

28101784955 is an equidigital number, since it uses as much as digits as its factorization.

28101784955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5620356996.

The product of its (nonzero) digits is 806400, while the sum is 50.

The spelling of 28101784955 in words is "twenty-eight billion, one hundred one million, seven hundred eighty-four thousand, nine hundred fifty-five".