228721003648 has 16 divisors (see below), whose sum is σ = 455655124710. Its totient is φ = 114360501760.

The previous prime is 228721003607. The next prime is 228721003661. The reversal of 228721003648 is 846300127822.

It can be written as a sum of positive squares in only one way, i.e., 191360752704 + 37360250944 = 437448^2 + 193288^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 893441293 + ... + 893441548.

Almost surely, 2^228721003648 is an apocalyptic number.

It is an amenable number.

228721003648 is a deficient number, since it is larger than the sum of its proper divisors (226934121062).

228721003648 is an equidigital number, since it uses as much as digits as its factorization.

228721003648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1786882855 (or 1786882843 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 43.

The spelling of 228721003648 in words is "two hundred twenty-eight billion, seven hundred twenty-one million, three thousand, six hundred forty-eight".