1325664055 has 4 divisors (see below), whose sum is σ = 1590796872. Its totient is φ = 1060531240.

The previous prime is 1325664049. The next prime is 1325664059. The reversal of 1325664055 is 5504665231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5504665231 = 13 ⋅423435787.

It is not a de Polignac number, because 1325664055 - 2²¹ = 1323566903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1325664059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132566401 + ... + 132566410.

It is an arithmetic number, because the mean of its divisors is an integer number (397699218).

Almost surely, 2^1325664055 is an apocalyptic number.

1325664055 is a deficient number, since it is larger than the sum of its proper divisors (265132817).

1325664055 is an equidigital number, since it uses as much as digits as its factorization.

1325664055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265132816.

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

The square root of 1325664055 is about 36409.6698007549. The cubic root of 1325664055 is about 1098.5280739726.

The spelling of 1325664055 in words is "one billion, three hundred twenty-five million, six hundred sixty-four thousand, fifty-five".