1664045043 has 8 divisors (see below), whose sum is σ = 2219883456. Its totient is φ = 1108785000.

The previous prime is 1664044957. The next prime is 1664045083. The reversal of 1664045043 is 3405404661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1664045043 - 2⁹ = 1664044531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1664044995 and 1664045013.

It is not an unprimeable number, because it can be changed into a prime (1664045083) 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, 137833 + ... + 149418.

It is an arithmetic number, because the mean of its divisors is an integer number (277485432).

Almost surely, 2^1664045043 is an apocalyptic number.

1664045043 is a deficient number, since it is larger than the sum of its proper divisors (555838413).

1664045043 is a wasteful number, since it uses less digits than its factorization.

1664045043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289185.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 1664045043 is about 40792.7082086983. The cubic root of 1664045043 is about 1185.0091195510.

The spelling of 1664045043 in words is "one billion, six hundred sixty-four million, forty-five thousand, forty-three".