4651421521 has 8 divisors (see below), whose sum is σ = 4903744320. Its totient is φ = 4399849872.

The previous prime is 4651421501. The next prime is 4651421557. The reversal of 4651421521 is 1251241564.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4651421521 - 2¹¹ = 4651419473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4651421501) 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 7 ways as a sum of consecutive naturals, for example, 175045 + ... + 199858.

It is an arithmetic number, because the mean of its divisors is an integer number (612968040).

Almost surely, 2^4651421521 is an apocalyptic number.

It is an amenable number.

4651421521 is a deficient number, since it is larger than the sum of its proper divisors (252322799).

4651421521 is a wasteful number, since it uses less digits than its factorization.

4651421521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375575.

The product of its digits is 9600, while the sum is 31.

The square root of 4651421521 is about 68201.3307861364. The cubic root of 4651421521 is about 1669.2776013074.

The spelling of 4651421521 in words is "four billion, six hundred fifty-one million, four hundred twenty-one thousand, five hundred twenty-one".