4521306816 has 224 divisors, whose sum is σ = 14666366400. Its totient is φ = 1356963840.

The previous prime is 4521306707. The next prime is 4521306833. The reversal of 4521306816 is 6186031254.

It is a happy number.

4521306816 is a `hidden beast` number, since 452 + 130 + 68 + 16 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 918570 + ... + 923478.

It is an arithmetic number, because the mean of its divisors is an integer number (65474850).

Almost surely, 2^4521306816 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 4521306816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7333183200).

4521306816 is an abundant number, since it is smaller than the sum of its proper divisors (10145059584).

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

4521306816 is a wasteful number, since it uses less digits than its factorization.

4521306816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4984 (or 4968 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 4521306816 is about 67240.6634113614. The cubic root of 4521306816 is about 1653.5652099918.

The spelling of 4521306816 in words is "four billion, five hundred twenty-one million, three hundred six thousand, eight hundred sixteen".