4645567421 has 4 divisors (see below), whose sum is σ = 5067891744. Its totient is φ = 4223243100.

The previous prime is 4645567379. The next prime is 4645567453. The reversal of 4645567421 is 1247655464.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4645567421 - 2¹⁰ = 4645566397 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 (4645567481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211162145 + ... + 211162166.

It is an arithmetic number, because the mean of its divisors is an integer number (1266972936).

Almost surely, 2^4645567421 is an apocalyptic number.

It is an amenable number.

4645567421 is a deficient number, since it is larger than the sum of its proper divisors (422324323).

4645567421 is a wasteful number, since it uses less digits than its factorization.

4645567421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422324322.

The product of its digits is 806400, while the sum is 44.

The square root of 4645567421 is about 68158.3994897181. The cubic root of 4645567421 is about 1668.5770111449.

The spelling of 4645567421 in words is "four billion, six hundred forty-five million, five hundred sixty-seven thousand, four hundred twenty-one".