646247485 has 8 divisors (see below), whose sum is σ = 835150680. Its totient is φ = 477228864.

The previous prime is 646247461. The next prime is 646247507. The reversal of 646247485 is 584742646.

It is a happy number.

646247485 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 4 ways, for example, as 23794884 + 622452601 = 4878^2 + 24949^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 646247485 - 2²⁹ = 109376573 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4971070 + ... + 4971199.

It is an arithmetic number, because the mean of its divisors is an integer number (104393835).

Almost surely, 2^646247485 is an apocalyptic number.

646247485 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

646247485 is a deficient number, since it is larger than the sum of its proper divisors (188903195).

646247485 is a wasteful number, since it uses less digits than its factorization.

646247485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9942287.

The product of its digits is 1290240, while the sum is 46.

The square root of 646247485 is about 25421.3981716191. The cubic root of 646247485 is about 864.5689255076.

The spelling of 646247485 in words is "six hundred forty-six million, two hundred forty-seven thousand, four hundred eighty-five".