4872691521 has 24 divisors (see below), whose sum is σ = 7462450944. Its totient is φ = 3053232000.

The previous prime is 4872691477. The next prime is 4872691553. The reversal of 4872691521 is 1251962784.

It is not a de Polignac number, because 4872691521 - 2¹⁰ = 4872690497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4872691591) 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 23 ways as a sum of consecutive naturals, for example, 93700 + ... + 136106.

It is an arithmetic number, because the mean of its divisors is an integer number (310935456).

Almost surely, 2^4872691521 is an apocalyptic number.

It is an amenable number.

4872691521 is a deficient number, since it is larger than the sum of its proper divisors (2589759423).

4872691521 is a wasteful number, since it uses less digits than its factorization.

4872691521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43181 (or 43178 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 4872691521 is about 69804.6668998571. Note that the first 3 decimals coincide. The cubic root of 4872691521 is about 1695.3380368432.

The spelling of 4872691521 in words is "four billion, eight hundred seventy-two million, six hundred ninety-one thousand, five hundred twenty-one".