43453640663 has 2 divisors, whose sum is σ = 43453640664. Its totient is φ = 43453640662.

The previous prime is 43453640599. The next prime is 43453640693. The reversal of 43453640663 is 36604635434.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43453640663 - 2⁶ = 43453640599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43453640693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21726820331 + 21726820332.

It is an arithmetic number, because the mean of its divisors is an integer number (21726820332).

Almost surely, 2^43453640663 is an apocalyptic number.

43453640663 is a deficient number, since it is larger than the sum of its proper divisors (1).

43453640663 is an equidigital number, since it uses as much as digits as its factorization.

43453640663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1866240, while the sum is 44.

The spelling of 43453640663 in words is "forty-three billion, four hundred fifty-three million, six hundred forty thousand, six hundred sixty-three".