646452576 has 480 divisors, whose sum is σ = 2458874880. Its totient is φ = 161740800.

The previous prime is 646452571. The next prime is 646452613. The reversal of 646452576 is 675254646.

646452576 is a `hidden beast` number, since 64 + 64 + 525 + 7 + 6 = 666.

Its product of digits (1209600) is a multiple of the sum of its prime factors (160).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646452571) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 8182905 + ... + 8182983.

It is an arithmetic number, because the mean of its divisors is an integer number (5122656).

Almost surely, 2^646452576 is an apocalyptic number.

646452576 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646452576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1229437440).

646452576 is an abundant number, since it is smaller than the sum of its proper divisors (1812422304).

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

646452576 is a wasteful number, since it uses less digits than its factorization.

646452576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 143 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 45.

The square root of 646452576 is about 25425.4316777513. The cubic root of 646452576 is about 864.6603747617.

The spelling of 646452576 in words is "six hundred forty-six million, four hundred fifty-two thousand, five hundred seventy-six".