646850775 has 12 divisors (see below), whose sum is σ = 1069460072. Its totient is φ = 344987040.

The previous prime is 646850773. The next prime is 646850777. The reversal of 646850775 is 577058646.

646850775 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 (646850773) and next prime (646850777).

It is not a de Polignac number, because 646850775 - 2¹ = 646850773 is a prime.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646850773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4312264 + ... + 4312413.

Almost surely, 2^646850775 is an apocalyptic number.

646850775 is a deficient number, since it is larger than the sum of its proper divisors (422609297).

646850775 is a wasteful number, since it uses less digits than its factorization.

646850775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8624690 (or 8624685 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 48.

The square root of 646850775 is about 25433.2611947426. The cubic root of 646850775 is about 864.8378748798.

The spelling of 646850775 in words is "six hundred forty-six million, eight hundred fifty thousand, seven hundred seventy-five".