1664051045 has 16 divisors (see below), whose sum is σ = 2034270720. Its totient is φ = 1306380864.

The previous prime is 1664051029. The next prime is 1664051057. The reversal of 1664051045 is 5401504661.

It is a cyclic number.

It is not a de Polignac number, because 1664051045 - 2⁴ = 1664051029 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174419 + ... + 183711.

It is an arithmetic number, because the mean of its divisors is an integer number (127141920).

Almost surely, 2^1664051045 is an apocalyptic number.

It is an amenable number.

1664051045 is a deficient number, since it is larger than the sum of its proper divisors (370219675).

1664051045 is an equidigital number, since it uses as much as digits as its factorization.

1664051045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9964.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 1664051045 is about 40792.7817757014. The cubic root of 1664051045 is about 1185.0105442753.

The spelling of 1664051045 in words is "one billion, six hundred sixty-four million, fifty-one thousand, forty-five".