646475116 has 96 divisors (see below), whose sum is σ = 1426747392. Its totient is φ = 249937920.

The previous prime is 646475111. The next prime is 646475117. The reversal of 646475116 is 611574646.

It is not an unprimeable number, because it can be changed into a prime (646475111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2847795 + ... + 2848021.

It is an arithmetic number, because the mean of its divisors is an integer number (14861952).

Almost surely, 2^646475116 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 646475116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (713373696).

646475116 is an abundant number, since it is smaller than the sum of its proper divisors (780272276).

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

646475116 is a wasteful number, since it uses less digits than its factorization.

646475116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479 (or 477 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 646475116 is about 25425.8749308652. The cubic root of 646475116 is about 864.6704240775.

The spelling of 646475116 in words is "six hundred forty-six million, four hundred seventy-five thousand, one hundred sixteen".