1326378275851 has 4 divisors (see below), whose sum is σ = 1331662651704. Its totient is φ = 1321093900000.

The previous prime is 1326378275839. The next prime is 1326378275921. The reversal of 1326378275851 is 1585728736231.

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

It is a cyclic number.

It is not a de Polignac number, because 1326378275851 - 2⁵ = 1326378275819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1326378275351) 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, 2642187550 + ... + 2642188051.

It is an arithmetic number, because the mean of its divisors is an integer number (332915662926).

Almost surely, 2^{1326378275851} is an apocalyptic number.

1326378275851 is a deficient number, since it is larger than the sum of its proper divisors (5284375853).

1326378275851 is an equidigital number, since it uses as much as digits as its factorization.

1326378275851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5284375852.

The product of its digits is 16934400, while the sum is 58.

The spelling of 1326378275851 in words is "one trillion, three hundred twenty-six billion, three hundred seventy-eight million, two hundred seventy-five thousand, eight hundred fifty-one".