646158336 has 96 divisors (see below), whose sum is σ = 1733659200. Its totient is φ = 214016000.

The previous prime is 646158323. The next prime is 646158349. The reversal of 646158336 is 633851646.

It is an interprime number because it is at equal distance from previous prime (646158323) and next prime (646158349).

It is a tau number, because it is divible by the number of its divisors (96).

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, 1541935 + ... + 1542353.

It is an arithmetic number, because the mean of its divisors is an integer number (18058950).

Almost surely, 2^646158336 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646158336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (866829600).

646158336 is an abundant number, since it is smaller than the sum of its proper divisors (1087500864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646158336 is a wasteful number, since it uses less digits than its factorization.

646158336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695 (or 675 counting only the distinct ones).

The product of its digits is 311040, while the sum is 42.

The square root of 646158336 is about 25419.6446867379. The cubic root of 646158336 is about 864.5291682931.

The spelling of 646158336 in words is "six hundred forty-six million, one hundred fifty-eight thousand, three hundred thirty-six".