1664050549115 has 4 divisors (see below), whose sum is σ = 1996860658944. Its totient is φ = 1331240439288.

The previous prime is 1664050549027. The next prime is 1664050549129. The reversal of 1664050549115 is 5119450504661.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1664050549115 - 2³⁴ = 1646870679931 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1664050549115.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166405054907 + ... + 166405054916.

It is an arithmetic number, because the mean of its divisors is an integer number (499215164736).

Almost surely, 2^{1664050549115} is an apocalyptic number.

1664050549115 is a deficient number, since it is larger than the sum of its proper divisors (332810109829).

1664050549115 is an equidigital number, since it uses as much as digits as its factorization.

1664050549115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332810109828.

The product of its (nonzero) digits is 648000, while the sum is 47.

The spelling of 1664050549115 in words is "one trillion, six hundred sixty-four billion, fifty million, five hundred forty-nine thousand, one hundred fifteen".