646225288152 has 128 divisors (see below), whose sum is σ = 1660906045440. Its totient is φ = 209426901120.

The previous prime is 646225288123. The next prime is 646225288169. The reversal of 646225288152 is 251882522646.

It is a junction number, because it is equal to n+sod(n) for n = 646225288095 and 646225288104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 195409683 + ... + 195412989.

It is an arithmetic number, because the mean of its divisors is an integer number (12975828480).

Almost surely, 2^646225288152 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 646225288152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (830453022720).

646225288152 is an abundant number, since it is smaller than the sum of its proper divisors (1014680757288).

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

646225288152 is a wasteful number, since it uses less digits than its factorization.

646225288152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4461 (or 4457 counting only the distinct ones).

The product of its digits is 3686400, while the sum is 51.

The spelling of 646225288152 in words is "six hundred forty-six billion, two hundred twenty-five million, two hundred eighty-eight thousand, one hundred fifty-two".