1355565664 has 12 divisors (see below), whose sum is σ = 2668769964. Its totient is φ = 677782816.

The previous prime is 1355565643. The next prime is 1355565667. The reversal of 1355565664 is 4665655531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355565667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21180682 + ... + 21180745.

It is an arithmetic number, because the mean of its divisors is an integer number (222397497).

Almost surely, 2^1355565664 is an apocalyptic number.

It is an amenable number.

1355565664 is a deficient number, since it is larger than the sum of its proper divisors (1313204300).

1355565664 is an equidigital number, since it uses as much as digits as its factorization.

1355565664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42361437 (or 42361429 counting only the distinct ones).

The product of its digits is 1620000, while the sum is 46.

The square root of 1355565664 is about 36818.0073333688. The cubic root of 1355565664 is about 1106.7261879891.

The spelling of 1355565664 in words is "one billion, three hundred fifty-five million, five hundred sixty-five thousand, six hundred sixty-four".