647064405 has 48 divisors (see below), whose sum is σ = 1260395136. Its totient is φ = 304698240.

The previous prime is 647064401. The next prime is 647064409. The reversal of 647064405 is 504460746.

647064405 is a `hidden beast` number, since 6 + 4 + 7 + 0 + 644 + 0 + 5 = 666.

647064405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (647064401) and next prime (647064409).

It is not a de Polignac number, because 647064405 - 2² = 647064401 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 647064405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647064401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10591 + ... + 37500.

It is an arithmetic number, because the mean of its divisors is an integer number (26258232).

Almost surely, 2^647064405 is an apocalyptic number.

647064405 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

647064405 is a deficient number, since it is larger than the sum of its proper divisors (613330731).

647064405 is a wasteful number, since it uses less digits than its factorization.

647064405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48138 (or 48135 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 647064405 is about 25437.4606633602. The cubic root of 647064405 is about 864.9330719932.

The spelling of 647064405 in words is "six hundred forty-seven million, sixty-four thousand, four hundred five".