647232617044 has 24 divisors (see below), whose sum is σ = 1233490000680. Its totient is φ = 295366308864.

The previous prime is 647232617029. The next prime is 647232617107. The reversal of 647232617044 is 440716232746.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 83625072400 + 563607544644 = 289180^2 + 750738^2 .

It is a junction number, because it is equal to n+sod(n) for n = 647232616985 and 647232617003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69921109 + ... + 69930364.

It is an arithmetic number, because the mean of its divisors is an integer number (51395416695).

Almost surely, 2^647232617044 is an apocalyptic number.

It is an amenable number.

647232617044 is a deficient number, since it is larger than the sum of its proper divisors (586257383636).

647232617044 is a wasteful number, since it uses less digits than its factorization.

647232617044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139851579 (or 139851577 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 46.

The spelling of 647232617044 in words is "six hundred forty-seven billion, two hundred thirty-two million, six hundred seventeen thousand, forty-four".