43353642691 has 2 divisors, whose sum is σ = 43353642692. Its totient is φ = 43353642690.

The previous prime is 43353642671. The next prime is 43353642697. The reversal of 43353642691 is 19624635334.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43353642691 - 2³³ = 34763708099 is a prime.

It is not a weakly prime, because it can be changed into another prime (43353642697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21676821345 + 21676821346.

It is an arithmetic number, because the mean of its divisors is an integer number (21676821346).

Almost surely, 2^43353642691 is an apocalyptic number.

43353642691 is a deficient number, since it is larger than the sum of its proper divisors (1).

43353642691 is an equidigital number, since it uses as much as digits as its factorization.

43353642691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 46.

The spelling of 43353642691 in words is "forty-three billion, three hundred fifty-three million, six hundred forty-two thousand, six hundred ninety-one".