28825771945571 has 4 divisors (see below), whose sum is σ = 28867976590392. Its totient is φ = 28783567300752.

The previous prime is 28825771945519. The next prime is 28825771945573. The reversal of 28825771945571 is 17554917752882.

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

It is a cyclic number.

It is not a de Polignac number, because 28825771945571 - 2¹⁴ = 28825771929187 is a prime.

It is a super-2 number, since 2×28825771945571² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28825771945495 and 28825771945504.

It is not an unprimeable number, because it can be changed into a prime (28825771945573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21102321386 + ... + 21102322751.

It is an arithmetic number, because the mean of its divisors is an integer number (7216994147598).

Almost surely, 2^{28825771945571} is an apocalyptic number.

28825771945571 is a deficient number, since it is larger than the sum of its proper divisors (42204644821).

28825771945571 is an equidigital number, since it uses as much as digits as its factorization.

28825771945571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42204644820.

The product of its digits is 395136000, while the sum is 71.

The spelling of 28825771945571 in words is "twenty-eight trillion, eight hundred twenty-five billion, seven hundred seventy-one million, nine hundred forty-five thousand, five hundred seventy-one".