225645776929 has 4 divisors (see below), whose sum is σ = 225979080084. Its totient is φ = 225312473776.

The previous prime is 225645776891. The next prime is 225645776953. The reversal of 225645776929 is 929677546522.

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

It can be written as a sum of positive squares in 2 ways, for example, as 146898192529 + 78747584400 = 383273^2 + 280620^2 .

It is a cyclic number.

It is not a de Polignac number, because 225645776929 - 2⁷ = 225645776801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225645776999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166650562 + ... + 166651915.

It is an arithmetic number, because the mean of its divisors is an integer number (56494770021).

Almost surely, 2^225645776929 is an apocalyptic number.

It is an amenable number.

225645776929 is a deficient number, since it is larger than the sum of its proper divisors (333303155).

225645776929 is an equidigital number, since it uses as much as digits as its factorization.

225645776929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333303154.

The product of its digits is 114307200, while the sum is 64.

The spelling of 225645776929 in words is "two hundred twenty-five billion, six hundred forty-five million, seven hundred seventy-six thousand, nine hundred twenty-nine".