1325565555 has 48 divisors (see below), whose sum is σ = 2243233440. Its totient is φ = 668276224.

The previous prime is 1325565481. The next prime is 1325565559. The reversal of 1325565555 is 5555655231.

It is not a de Polignac number, because 1325565555 - 2¹¹ = 1325563507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1325565559) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 705277 + ... + 707153.

It is an arithmetic number, because the mean of its divisors is an integer number (46734030).

Almost surely, 2^1325565555 is an apocalyptic number.

1325565555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1325565555 is a deficient number, since it is larger than the sum of its proper divisors (917667885).

1325565555 is a wasteful number, since it uses less digits than its factorization.

1325565555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020 (or 1997 counting only the distinct ones).

The product of its digits is 562500, while the sum is 42.

The square root of 1325565555 is about 36408.3171129894. The cubic root of 1325565555 is about 1098.5008655470.

The spelling of 1325565555 in words is "one billion, three hundred twenty-five million, five hundred sixty-five thousand, five hundred fifty-five".