647501725 has 24 divisors (see below), whose sum is σ = 885771432. Its totient is φ = 466483200.

The previous prime is 647501713. The next prime is 647501731. The reversal of 647501725 is 527105746.

647501725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 432556804 + 214944921 = 20798^2 + 14661^2 .

It is not a de Polignac number, because 647501725 - 2¹⁹ = 646977437 is a prime.

It is a congruent 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, 10972 + ... + 37621.

It is an arithmetic number, because the mean of its divisors is an integer number (36907143).

Almost surely, 2^647501725 is an apocalyptic number.

647501725 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

647501725 is a deficient number, since it is larger than the sum of its proper divisors (238269707).

647501725 is a wasteful number, since it uses less digits than its factorization.

647501725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48657 (or 48652 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 37.

The square root of 647501725 is about 25446.0551952557. The cubic root of 647501725 is about 865.1278837955.

The spelling of 647501725 in words is "six hundred forty-seven million, five hundred one thousand, seven hundred twenty-five".