1664143043 has 16 divisors (see below), whose sum is σ = 1754075136. Its totient is φ = 1576804320.

The previous prime is 1664143037. The next prime is 1664143051. The reversal of 1664143043 is 3403414661.

It is a cyclic number.

It is not a de Polignac number, because 1664143043 - 2²² = 1659948739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1664140043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 607988 + ... + 610718.

It is an arithmetic number, because the mean of its divisors is an integer number (109629696).

Almost surely, 2^1664143043 is an apocalyptic number.

1664143043 is a deficient number, since it is larger than the sum of its proper divisors (89932093).

1664143043 is a wasteful number, since it uses less digits than its factorization.

1664143043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3194.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 1664143043 is about 40793.9093860836. The cubic root of 1664143043 is about 1185.0323818648.

The spelling of 1664143043 in words is "one billion, six hundred sixty-four million, one hundred forty-three thousand, forty-three".