6457504021 has 8 divisors (see below), whose sum is σ = 6479642520. Its totient is φ = 6435383808.

The previous prime is 6457503959. The next prime is 6457504033. The reversal of 6457504021 is 1204057546.

6457504021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 11662225 + 6445841796 = 3415^2 + 80286^2 .

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 6457504021 - 2⁹ = 6457503509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6457504051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1321635 + ... + 1326511.

It is an arithmetic number, because the mean of its divisors is an integer number (809955315).

Almost surely, 2^6457504021 is an apocalyptic number.

It is an amenable number.

6457504021 is a deficient number, since it is larger than the sum of its proper divisors (22138499).

6457504021 is a wasteful number, since it uses less digits than its factorization.

6457504021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9143.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 6457504021 is about 80358.5964349801. The cubic root of 6457504021 is about 1862.1795874561.

The spelling of 6457504021 in words is "six billion, four hundred fifty-seven million, five hundred four thousand, twenty-one".