249563648 has 20 divisors (see below), whose sum is σ = 498640890. Its totient is φ = 124781568.

The previous prime is 249563641. The next prime is 249563663. The reversal of 249563648 is 846365942.

It can be written as a sum of positive squares in only one way, i.e., 130142464 + 119421184 = 11408^2 + 10928^2 .

It is not an unprimeable number, because it can be changed into a prime (249563641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243203 + ... + 244226.

Almost surely, 2^249563648 is an apocalyptic number.

It is an amenable number.

249563648 is a deficient number, since it is larger than the sum of its proper divisors (249077242).

249563648 is an frugal number, since it uses more digits than its factorization.

249563648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487447 (or 487431 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 47.

The square root of 249563648 is about 15797.5836126922. The cubic root of 249563648 is about 629.5937987890.

The spelling of 249563648 in words is "two hundred forty-nine million, five hundred sixty-three thousand, six hundred forty-eight".