1323335664 has 160 divisors (see below), whose sum is σ = 4442493440. Its totient is φ = 369266688.

The previous prime is 1323335653. The next prime is 1323335681. The reversal of 1323335664 is 4665333231.

1323335664 is a `hidden beast` number, since 13 + 233 + 356 + 64 = 666.

It is a super-2 number, since 2×1323335664² = 3502434559228641792, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124944 + ... + 135120.

It is an arithmetic number, because the mean of its divisors is an integer number (27765584).

Almost surely, 2^1323335664 is an apocalyptic number.

1323335664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1323335664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2221246720).

1323335664 is an abundant number, since it is smaller than the sum of its proper divisors (3119157776).

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

1323335664 is a wasteful number, since it uses less digits than its factorization.

1323335664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10244 (or 10232 counting only the distinct ones).

The product of its digits is 116640, while the sum is 36.

The square root of 1323335664 is about 36377.6808496638. The cubic root of 1323335664 is about 1097.8845469697.

Adding to 1323335664 its reverse (4665333231), we get a palindrome (5988668895).

The spelling of 1323335664 in words is "one billion, three hundred twenty-three million, three hundred thirty-five thousand, six hundred sixty-four".