43453640671 has 4 divisors (see below), whose sum is σ = 49661303632. Its totient is φ = 37245977712.

The previous prime is 43453640663. The next prime is 43453640693. The reversal of 43453640671 is 17604635434.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43453640671 - 2³ = 43453640663 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 (43453610671) 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, 3103831470 + ... + 3103831483.

It is an arithmetic number, because the mean of its divisors is an integer number (12415325908).

Almost surely, 2^43453640671 is an apocalyptic number.

43453640671 is a deficient number, since it is larger than the sum of its proper divisors (6207662961).

43453640671 is an equidigital number, since it uses as much as digits as its factorization.

43453640671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6207662960.

The product of its (nonzero) digits is 725760, while the sum is 43.

The spelling of 43453640671 in words is "forty-three billion, four hundred fifty-three million, six hundred forty thousand, six hundred seventy-one".