646891083 has 16 divisors (see below), whose sum is σ = 959546400. Its totient is φ = 430725600.

The previous prime is 646891073. The next prime is 646891087. The reversal of 646891083 is 380198646.

646891083 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 646891083 - 2¹⁶ = 646825547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (646891087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7933 + ... + 36833.

It is an arithmetic number, because the mean of its divisors is an integer number (59971650).

Almost surely, 2^646891083 is an apocalyptic number.

646891083 is a deficient number, since it is larger than the sum of its proper divisors (312655317).

646891083 is a wasteful number, since it uses less digits than its factorization.

646891083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29739 (or 29733 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 646891083 is about 25434.0536092853. The cubic root of 646891083 is about 864.8558384052.

The spelling of 646891083 in words is "six hundred forty-six million, eight hundred ninety-one thousand, eighty-three".