1664136384 has 28 divisors (see below), whose sum is σ = 4403028024. Its totient is φ = 554712064.

The previous prime is 1664136373. The next prime is 1664136401. The reversal of 1664136384 is 4836314661.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4333497 + ... + 4333880.

Almost surely, 2^1664136384 is an apocalyptic number.

It is an amenable number.

1664136384 is an abundant number, since it is smaller than the sum of its proper divisors (2738891640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1664136384 is an equidigital number, since it uses as much as digits as its factorization.

1664136384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8667392 (or 8667382 counting only the distinct ones).

The product of its digits is 248832, while the sum is 42.

The square root of 1664136384 is about 40793.8277684259. The cubic root of 1664136384 is about 1185.0308012432.

The spelling of 1664136384 in words is "one billion, six hundred sixty-four million, one hundred thirty-six thousand, three hundred eighty-four".