43450409491 has 8 divisors (see below), whose sum is σ = 44514825264. Its totient is φ = 42395052960.

The previous prime is 43450409479. The next prime is 43450409537. The reversal of 43450409491 is 19490405434.

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 43450409491 - 2⁹ = 43450408979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43450409411) 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, 2255101 + ... + 2274286.

It is an arithmetic number, because the mean of its divisors is an integer number (5564353158).

Almost surely, 2^43450409491 is an apocalyptic number.

43450409491 is a deficient number, since it is larger than the sum of its proper divisors (1064415773).

43450409491 is a wasteful number, since it uses less digits than its factorization.

43450409491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4529621.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 43450409491 in words is "forty-three billion, four hundred fifty million, four hundred nine thousand, four hundred ninety-one".