646423113 has 16 divisors (see below), whose sum is σ = 1042968960. Its totient is φ = 347655936.

The previous prime is 646423093. The next prime is 646423117. The reversal of 646423113 is 311324646.

It is not a de Polignac number, because 646423113 - 2¹⁰ = 646422089 is a prime.

It is a super-2 number, since 2×646423113² = 835725682041221538, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (646423117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 904998 + ... + 905711.

It is an arithmetic number, because the mean of its divisors is an integer number (65185560).

Almost surely, 2^646423113 is an apocalyptic number.

It is an amenable number.

646423113 is a deficient number, since it is larger than the sum of its proper divisors (396545847).

646423113 is a wasteful number, since it uses less digits than its factorization.

646423113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810736.

The product of its digits is 10368, while the sum is 30.

The square root of 646423113 is about 25424.8522709572. The cubic root of 646423113 is about 864.6472385180.

Adding to 646423113 its reverse (311324646), we get a palindrome (957747759).

The spelling of 646423113 in words is "six hundred forty-six million, four hundred twenty-three thousand, one hundred thirteen".