4551553521 has 12 divisors (see below), whose sum is σ = 6595209972. Its totient is φ = 3024794976.

The previous prime is 4551553499. The next prime is 4551553537. The reversal of 4551553521 is 1253551554.

4551553521 is a `hidden beast` number, since 4 + 5 + 51 + 553 + 52 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 111197025 + 4440356496 = 10545^2 + 66636^2 .

It is not a de Polignac number, because 4551553521 - 2¹³ = 4551545329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4551553561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 794826 + ... + 800531.

It is an arithmetic number, because the mean of its divisors is an integer number (549600831).

Almost surely, 2^4551553521 is an apocalyptic number.

It is an amenable number.

4551553521 is a deficient number, since it is larger than the sum of its proper divisors (2043656451).

4551553521 is a wasteful number, since it uses less digits than its factorization.

4551553521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595680 (or 1595677 counting only the distinct ones).

The product of its digits is 75000, while the sum is 36.

The square root of 4551553521 is about 67465.2022971843. The cubic root of 4551553521 is about 1657.2443661642.

The spelling of 4551553521 in words is "four billion, five hundred fifty-one million, five hundred fifty-three thousand, five hundred twenty-one".