647240553250 has 16 divisors (see below), whose sum is σ = 1211634316152. Its totient is φ = 258896221200.

The previous prime is 647240553233. The next prime is 647240553287. The reversal of 647240553250 is 52355042746.

It can be written as a sum of positive squares in 4 ways, for example, as 74992179409 + 572248373841 = 273847^2 + 756471^2 .

It is a junction number, because it is equal to n+sod(n) for n = 647240553197 and 647240553206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1294480857 + ... + 1294481356.

Almost surely, 2^647240553250 is an apocalyptic number.

647240553250 is a deficient number, since it is larger than the sum of its proper divisors (564393762902).

647240553250 is a wasteful number, since it uses less digits than its factorization.

647240553250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2588962230 (or 2588962220 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 43.

Adding to 647240553250 its reverse (52355042746), we get a palindrome (699595595996).

The spelling of 647240553250 in words is "six hundred forty-seven billion, two hundred forty million, five hundred fifty-three thousand, two hundred fifty".