647546025 has 144 divisors (see below), whose sum is σ = 1335343104. Its totient is φ = 275425920.

The previous prime is 647545999. The next prime is 647546027. The reversal of 647546025 is 520645746.

It is not a de Polignac number, because 647546025 - 2¹⁹ = 647021737 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647546027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 3972594 + ... + 3972756.

It is an arithmetic number, because the mean of its divisors is an integer number (9273216).

Almost surely, 2^647546025 is an apocalyptic number.

It is an amenable number.

647546025 is an abundant number, since it is smaller than the sum of its proper divisors (687797079).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

647546025 is a wasteful number, since it uses less digits than its factorization.

647546025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260 (or 248 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 39.

The square root of 647546025 is about 25446.9256492803. The cubic root of 647546025 is about 865.1476131078.

The spelling of 647546025 in words is "six hundred forty-seven million, five hundred forty-six thousand, twenty-five".