1325557556 has 24 divisors (see below), whose sum is σ = 2331390600. Its totient is φ = 659456000.

The previous prime is 1325557537. The next prime is 1325557561. The reversal of 1325557556 is 6557555231.

It can be written as a sum of positive squares in 4 ways, for example, as 582449956 + 743107600 = 24134^2 + 27260^2 .

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, 827156 + ... + 828756.

It is an arithmetic number, because the mean of its divisors is an integer number (97141275).

Almost surely, 2^1325557556 is an apocalyptic number.

It is an amenable number.

1325557556 is a deficient number, since it is larger than the sum of its proper divisors (1005833044).

1325557556 is a wasteful number, since it uses less digits than its factorization.

1325557556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2515 (or 2513 counting only the distinct ones).

The product of its digits is 787500, while the sum is 44.

The square root of 1325557556 is about 36408.2072615502. The cubic root of 1325557556 is about 1098.4986559427.

The spelling of 1325557556 in words is "one billion, three hundred twenty-five million, five hundred fifty-seven thousand, five hundred fifty-six".