1664162261013 has 16 divisors (see below), whose sum is σ = 2554109949440. Its totient is φ = 944108495856.

The previous prime is 1664162260997. The next prime is 1664162261039. The reversal of 1664162261013 is 3101622614661.

It is not a de Polignac number, because 1664162261013 - 2⁴ = 1664162260997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664162262013) 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, 285053995 + ... + 285059832.

It is an arithmetic number, because the mean of its divisors is an integer number (159631871840).

Almost surely, 2^{1664162261013} is an apocalyptic number.

It is an amenable number.

1664162261013 is a deficient number, since it is larger than the sum of its proper divisors (889947688427).

1664162261013 is a wasteful number, since it uses less digits than its factorization.

1664162261013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570113976.

The product of its (nonzero) digits is 62208, while the sum is 39.

Adding to 1664162261013 its reverse (3101622614661), we get a palindrome (4765784875674).

The spelling of 1664162261013 in words is "one trillion, six hundred sixty-four billion, one hundred sixty-two million, two hundred sixty-one thousand, thirteen".