225425644646 has 32 divisors (see below), whose sum is σ = 362503693440. Its totient is φ = 104761552896.

The previous prime is 225425644643. The next prime is 225425644649. The reversal of 225425644646 is 646446524522.

It is an interprime number because it is at equal distance from previous prime (225425644643) and next prime (225425644649).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 225425644594 and 225425644603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225425644643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1453160 + ... + 1600788.

It is an arithmetic number, because the mean of its divisors is an integer number (11328240420).

Almost surely, 2^225425644646 is an apocalyptic number.

225425644646 is a deficient number, since it is larger than the sum of its proper divisors (137078048794).

225425644646 is a wasteful number, since it uses less digits than its factorization.

225425644646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148208.

The product of its digits is 11059200, while the sum is 50.

The spelling of 225425644646 in words is "two hundred twenty-five billion, four hundred twenty-five million, six hundred forty-four thousand, six hundred forty-six".