646453416 has 256 divisors, whose sum is σ = 2064384000. Its totient is φ = 164540160.

The previous prime is 646453411. The next prime is 646453439. The reversal of 646453416 is 614354646.

It is not an unprimeable number, because it can be changed into a prime (646453411) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4650675 + ... + 4650813.

It is an arithmetic number, because the mean of its divisors is an integer number (8064000).

Almost surely, 2^646453416 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 646453416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1032192000).

646453416 is an abundant number, since it is smaller than the sum of its proper divisors (1417930584).

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

646453416 is a wasteful number, since it uses less digits than its factorization.

646453416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 248 counting only the distinct ones).

The product of its digits is 207360, while the sum is 39.

The square root of 646453416 is about 25425.4481966395. The cubic root of 646453416 is about 864.6607492745.

The spelling of 646453416 in words is "six hundred forty-six million, four hundred fifty-three thousand, four hundred sixteen".