1325643555 has 8 divisors (see below), whose sum is σ = 2121029712. Its totient is φ = 707009888.

The previous prime is 1325643551. The next prime is 1325643559. The reversal of 1325643555 is 5553465231.

It is an interprime number because it is at equal distance from previous prime (1325643551) and next prime (1325643559).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1325643555 - 2² = 1325643551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1325643551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44188104 + ... + 44188133.

It is an arithmetic number, because the mean of its divisors is an integer number (265128714).

Almost surely, 2^1325643555 is an apocalyptic number.

1325643555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1325643555 is a deficient number, since it is larger than the sum of its proper divisors (795386157).

1325643555 is an equidigital number, since it uses as much as digits as its factorization.

1325643555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88376245.

The product of its digits is 270000, while the sum is 39.

The square root of 1325643555 is about 36409.3882810464. The cubic root of 1325643555 is about 1098.5224114164.

The spelling of 1325643555 in words is "one billion, three hundred twenty-five million, six hundred forty-three thousand, five hundred fifty-five".