4646441421 has 16 divisors (see below), whose sum is σ = 6900062400. Its totient is φ = 3090227184.

The previous prime is 4646441413. The next prime is 4646441441. The reversal of 4646441421 is 1241446464.

4646441421 is a `hidden beast` number, since 4 + 6 + 4 + 644 + 1 + 4 + 2 + 1 = 666.

It is not a de Polignac number, because 4646441421 - 2³ = 4646441413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4646441441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194046 + ... + 216671.

It is an arithmetic number, because the mean of its divisors is an integer number (431253900).

Almost surely, 2^4646441421 is an apocalyptic number.

It is an amenable number.

4646441421 is a deficient number, since it is larger than the sum of its proper divisors (2253620979).

4646441421 is a wasteful number, since it uses less digits than its factorization.

4646441421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411145 (or 411139 counting only the distinct ones).

The product of its digits is 73728, while the sum is 36.

The square root of 4646441421 is about 68164.8107237158. The cubic root of 4646441421 is about 1668.6816445678.

Adding to 4646441421 its reverse (1241446464), we get a palindrome (5887887885).

The spelling of 4646441421 in words is "four billion, six hundred forty-six million, four hundred forty-one thousand, four hundred twenty-one".