225021667646 has 8 divisors (see below), whose sum is σ = 337725713640. Its totient is φ = 112446429768.

The previous prime is 225021667639. The next prime is 225021667657. The reversal of 225021667646 is 646766120522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 225021667646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32197661 + ... + 32204648.

It is an arithmetic number, because the mean of its divisors is an integer number (42215714205).

Almost surely, 2^225021667646 is an apocalyptic number.

225021667646 is a deficient number, since it is larger than the sum of its proper divisors (112704045994).

225021667646 is a wasteful number, since it uses less digits than its factorization.

225021667646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64404058.

The product of its (nonzero) digits is 1451520, while the sum is 47.

The spelling of 225021667646 in words is "two hundred twenty-five billion, twenty-one million, six hundred sixty-seven thousand, six hundred forty-six".