4543661640 has 256 divisors, whose sum is σ = 15857233920. Its totient is φ = 1020165120.

The previous prime is 4543661527. The next prime is 4543661651. The reversal of 4543661640 is 461663454.

It is a super-3 number, since 3×4543661640³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17276149 + ... + 17276411.

It is an arithmetic number, because the mean of its divisors is an integer number (61942320).

Almost surely, 2^4543661640 is an apocalyptic number.

4543661640 is a gapful number since it is divisible by the number (40) 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 4543661640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7928616960).

4543661640 is an abundant number, since it is smaller than the sum of its proper divisors (11313572280).

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

4543661640 is a wasteful number, since it uses less digits than its factorization.

4543661640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572 (or 568 counting only the distinct ones).

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

The square root of 4543661640 is about 67406.6883921766. The cubic root of 4543661640 is about 1656.2859870382.

The spelling of 4543661640 in words is "four billion, five hundred forty-three million, six hundred sixty-one thousand, six hundred forty".