1326564505 has 20 divisors (see below), whose sum is σ = 1857096612. Its totient is φ = 909636000.

The previous prime is 1326564479. The next prime is 1326564509. The reversal of 1326564505 is 5054656231.

It can be written as a sum of positive squares in 2 ways, for example, as 827310169 + 499254336 = 28763^2 + 22344^2 .

It is not a de Polignac number, because 1326564505 - 2⁹ = 1326563993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1326564509) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 43246 + ... + 67255.

Almost surely, 2^1326564505 is an apocalyptic number.

It is an amenable number.

1326564505 is a deficient number, since it is larger than the sum of its proper divisors (530532107).

1326564505 is an frugal number, since it uses more digits than its factorization.

1326564505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110534 (or 110513 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 37.

The square root of 1326564505 is about 36422.0332353920. The cubic root of 1326564505 is about 1098.7767407250.

The spelling of 1326564505 in words is "one billion, three hundred twenty-six million, five hundred sixty-four thousand, five hundred five".