647064441 has 6 divisors (see below), whose sum is σ = 934648650. Its totient is φ = 431376288.

The previous prime is 647064409. The next prime is 647064449. The reversal of 647064441 is 144460746.

647064441 is a `hidden beast` number, since 6 + 4 + 7 + 0 + 644 + 4 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 347636025 + 299428416 = 18645^2 + 17304^2 .

It is not a de Polignac number, because 647064441 - 2⁵ = 647064409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 647064396 and 647064405.

It is not an unprimeable number, because it can be changed into a prime (647064449) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35948016 + ... + 35948033.

It is an arithmetic number, because the mean of its divisors is an integer number (155774775).

Almost surely, 2^647064441 is an apocalyptic number.

It is an amenable number.

647064441 is a deficient number, since it is larger than the sum of its proper divisors (287584209).

647064441 is a wasteful number, since it uses less digits than its factorization.

647064441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71896055 (or 71896052 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 647064441 is about 25437.4613709780. The cubic root of 647064441 is about 864.9330880337.

The spelling of 647064441 in words is "six hundred forty-seven million, sixty-four thousand, four hundred forty-one".