225641655797 has 4 divisors (see below), whose sum is σ = 225807448236. Its totient is φ = 225475863360.

The previous prime is 225641655787. The next prime is 225641655803. The reversal of 225641655797 is 797556146522.

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 142184801476 + 83456854321 = 377074^2 + 288889^2 .

It is a cyclic number.

It is not a de Polignac number, because 225641655797 - 2⁸ = 225641655541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225641655787) 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, 82894178 + ... + 82896899.

It is an arithmetic number, because the mean of its divisors is an integer number (56451862059).

Almost surely, 2^225641655797 is an apocalyptic number.

It is an amenable number.

225641655797 is a deficient number, since it is larger than the sum of its proper divisors (165792439).

225641655797 is a wasteful number, since it uses less digits than its factorization.

225641655797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165792438.

The product of its digits is 31752000, while the sum is 59.

The spelling of 225641655797 in words is "two hundred twenty-five billion, six hundred forty-one million, six hundred fifty-five thousand, seven hundred ninety-seven".