1664518513 has 8 divisors (see below), whose sum is σ = 1902860928. Its totient is φ = 1426314624.

The previous prime is 1664518483. The next prime is 1664518523. The reversal of 1664518513 is 3158154661.

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

It is not a de Polignac number, because 1664518513 - 2²¹ = 1662421361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1664518523) 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, 7456 + ... + 58177.

It is an arithmetic number, because the mean of its divisors is an integer number (237857616).

Almost surely, 2^1664518513 is an apocalyptic number.

It is an amenable number.

1664518513 is a deficient number, since it is larger than the sum of its proper divisors (238342415).

1664518513 is an equidigital number, since it uses as much as digits as its factorization.

1664518513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69263.

The product of its digits is 86400, while the sum is 40.

The square root of 1664518513 is about 40798.5111615608. The cubic root of 1664518513 is about 1185.1214989334.

The spelling of 1664518513 in words is "one billion, six hundred sixty-four million, five hundred eighteen thousand, five hundred thirteen".