1326820665297 has 8 divisors (see below), whose sum is σ = 1816907577856. Its totient is φ = 860640431472.

The previous prime is 1326820665283. The next prime is 1326820665341. The reversal of 1326820665297 is 7925660286231.

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

It is not a de Polignac number, because 1326820665297 - 2⁸ = 1326820665041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1326820665217) 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, 5976669553 + ... + 5976669774.

It is an arithmetic number, because the mean of its divisors is an integer number (227113447232).

Almost surely, 2^{1326820665297} is an apocalyptic number.

It is an amenable number.

1326820665297 is a deficient number, since it is larger than the sum of its proper divisors (490086912559).

1326820665297 is a wasteful number, since it uses less digits than its factorization.

1326820665297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11953339367.

The product of its (nonzero) digits is 13063680, while the sum is 57.

The spelling of 1326820665297 in words is "one trillion, three hundred twenty-six billion, eight hundred twenty million, six hundred sixty-five thousand, two hundred ninety-seven".