46644646421 has 4 divisors (see below), whose sum is σ = 47301613344. Its totient is φ = 45987679500.

The previous prime is 46644646397. The next prime is 46644646441. The reversal of 46644646421 is 12464644664.

46644646421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-46644646421 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 (46644646441) 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, 328483355 + ... + 328483496.

It is an arithmetic number, because the mean of its divisors is an integer number (11825403336).

Almost surely, 2^46644646421 is an apocalyptic number.

It is an amenable number.

46644646421 is a deficient number, since it is larger than the sum of its proper divisors (656966923).

46644646421 is an equidigital number, since it uses as much as digits as its factorization.

46644646421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656966922.

The product of its digits is 2654208, while the sum is 47.

The spelling of 46644646421 in words is "forty-six billion, six hundred forty-four million, six hundred forty-six thousand, four hundred twenty-one".