1659544043 has 2 divisors, whose sum is σ = 1659544044. Its totient is φ = 1659544042.

The previous prime is 1659543973. The next prime is 1659544069. The reversal of 1659544043 is 3404459561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1659544043 - 2¹⁶ = 1659478507 is a prime.

It is not a weakly prime, because it can be changed into another prime (1659244043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 829772021 + 829772022.

It is an arithmetic number, because the mean of its divisors is an integer number (829772022).

Almost surely, 2^1659544043 is an apocalyptic number.

1659544043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1659544043 is an equidigital number, since it uses as much as digits as its factorization.

1659544043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 41.

The square root of 1659544043 is about 40737.5016784289. The cubic root of 1659544043 is about 1183.9397289729.

The spelling of 1659544043 in words is "one billion, six hundred fifty-nine million, five hundred forty-four thousand, forty-three".