4521553920 has 832 divisors, whose sum is σ = 18824883840. Its totient is φ = 1019215872.

The previous prime is 4521553919. The next prime is 4521553943. The reversal of 4521553920 is 293551254.

It is a happy number.

4521553920 is a `hidden beast` number, since 452 + 155 + 39 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (832).

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

It is a congruent number.

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, 122204142 + ... + 122204178.

Almost surely, 2^4521553920 is an apocalyptic number.

4521553920 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 4521553920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9412441920).

4521553920 is an abundant number, since it is smaller than the sum of its proper divisors (14303329920).

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

4521553920 is a wasteful number, since it uses less digits than its factorization.

4521553920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 4521553920 is about 67242.5008458192. The cubic root of 4521553920 is about 1653.5953336670.

The spelling of 4521553920 in words is "four billion, five hundred twenty-one million, five hundred fifty-three thousand, nine hundred twenty".