647131750225 has 24 divisors (see below), whose sum is σ = 831919066272. Its totient is φ = 498993091200.

The previous prime is 647131750217. The next prime is 647131750259. The reversal of 647131750225 is 522057131746.

It is a happy number.

It is not a de Polignac number, because 647131750225 - 2³ = 647131750217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3718227 + ... + 3888376.

It is an arithmetic number, because the mean of its divisors is an integer number (34663294428).

Almost surely, 2^647131750225 is an apocalyptic number.

It is an amenable number.

647131750225 is a deficient number, since it is larger than the sum of its proper divisors (184787316047).

647131750225 is a wasteful number, since it uses less digits than its factorization.

647131750225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7606737 (or 7606732 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 43.

The spelling of 647131750225 in words is "six hundred forty-seven billion, one hundred thirty-one million, seven hundred fifty thousand, two hundred twenty-five".