4809871521 has 48 divisors (see below), whose sum is σ = 8557960320. Its totient is φ = 2534976000.

The previous prime is 4809871513. The next prime is 4809871553. The reversal of 4809871521 is 1251789084.

4809871521 is a `hidden beast` number, since 48 + 0 + 9 + 87 + 1 + 521 = 666.

4809871521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4809871521 - 2³ = 4809871513 is a prime.

It is a super-3 number, since 3×4809871521³ (a number of 30 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (4809871321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1842265 + ... + 1844873.

It is an arithmetic number, because the mean of its divisors is an integer number (178290840).

Almost surely, 2^4809871521 is an apocalyptic number.

It is an amenable number.

4809871521 is a deficient number, since it is larger than the sum of its proper divisors (3748088799).

4809871521 is a wasteful number, since it uses less digits than its factorization.

4809871521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4886 (or 4883 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 4809871521 is about 69353.2372784429. The cubic root of 4809871521 is about 1688.0209225683.

The spelling of 4809871521 in words is "four billion, eight hundred nine million, eight hundred seventy-one thousand, five hundred twenty-one".