43664650421 has 8 divisors (see below), whose sum is σ = 49910346240. Its totient is φ = 37420926768.

The previous prime is 43664650387. The next prime is 43664650427. The reversal of 43664650421 is 12405646634.

43664650421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 43664650421 - 2²⁶ = 43597541557 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 (43664650427) 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, 445286 + ... + 534423.

It is an arithmetic number, because the mean of its divisors is an integer number (6238793280).

Almost surely, 2^43664650421 is an apocalyptic number.

It is an amenable number.

43664650421 is a deficient number, since it is larger than the sum of its proper divisors (6245695819).

43664650421 is an equidigital number, since it uses as much as digits as its factorization.

43664650421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986083.

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 43664650421 in words is "forty-three billion, six hundred sixty-four million, six hundred fifty thousand, four hundred twenty-one".