28219042177 has 6 divisors (see below), whose sum is σ = 28340728262. Its totient is φ = 28097876352.

The previous prime is 28219042153. The next prime is 28219042183. The reversal of 28219042177 is 77124091282.

It can be written as a sum of positive squares in 3 ways, for example, as 2209094001 + 26009948176 = 47001^2 + 161276^2 .

It is not a de Polignac number, because 28219042177 - 2¹⁵ = 28219009409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28219042277) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 205608 + ... + 314185.

Almost surely, 2^28219042177 is an apocalyptic number.

It is an amenable number.

28219042177 is a deficient number, since it is larger than the sum of its proper divisors (121686085).

28219042177 is an frugal number, since it uses more digits than its factorization.

28219042177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520259 (or 520026 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 43.

The spelling of 28219042177 in words is "twenty-eight billion, two hundred nineteen million, forty-two thousand, one hundred seventy-seven".