225536866836 has 72 divisors (see below), whose sum is σ = 550862747904. Its totient is φ = 71814272640.

The previous prime is 225536866777. The next prime is 225536866837. The reversal of 225536866836 is 638668635522.

It is a self number, because there is not a number n which added to its sum of digits gives 225536866836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225536866837) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4807485 + ... + 4854171.

Almost surely, 2^225536866836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225536866836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275431373952).

225536866836 is an abundant number, since it is smaller than the sum of its proper divisors (325325881068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225536866836 is a wasteful number, since it uses less digits than its factorization.

225536866836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47501 (or 47476 counting only the distinct ones).

The product of its digits is 74649600, while the sum is 60.

The spelling of 225536866836 in words is "two hundred twenty-five billion, five hundred thirty-six million, eight hundred sixty-six thousand, eight hundred thirty-six".