1328655089269 has 4 divisors (see below), whose sum is σ = 1328678049996. Its totient is φ = 1328632128544.

The previous prime is 1328655089173. The next prime is 1328655089287. The reversal of 1328655089269 is 9629805568231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1200142160100 + 128512929169 = 1095510^2 + 358487^2 .

It is a cyclic number.

It is not a de Polignac number, because 1328655089269 - 2¹³ = 1328655081077 is a prime.

It is a super-2 number, since 2×1328655089269² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1328655089269.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328655087269) 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, 11393344 + ... + 11509369.

It is an arithmetic number, because the mean of its divisors is an integer number (332169512499).

Almost surely, 2^{1328655089269} is an apocalyptic number.

It is an amenable number.

1328655089269 is a deficient number, since it is larger than the sum of its proper divisors (22960727).

1328655089269 is an equidigital number, since it uses as much as digits as its factorization.

1328655089269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22960726.

The product of its (nonzero) digits is 55987200, while the sum is 64.

The spelling of 1328655089269 in words is "one trillion, three hundred twenty-eight billion, six hundred fifty-five million, eighty-nine thousand, two hundred sixty-nine".