1329783664 has 40 divisors (see below), whose sum is σ = 2812788720. Its totient is φ = 603993600.

The previous prime is 1329783649. The next prime is 1329783677. The reversal of 1329783664 is 4663879231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375052 + ... + 378580.

It is an arithmetic number, because the mean of its divisors is an integer number (70319718).

Almost surely, 2^1329783664 is an apocalyptic number.

It is an amenable number.

1329783664 is an abundant number, since it is smaller than the sum of its proper divisors (1483005056).

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

1329783664 is a wasteful number, since it uses less digits than its factorization.

1329783664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5689 (or 5683 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 49.

The square root of 1329783664 is about 36466.1989244835. The cubic root of 1329783664 is about 1099.6648190895.

The spelling of 1329783664 in words is "one billion, three hundred twenty-nine million, seven hundred eighty-three thousand, six hundred sixty-four".