1327809156765 has 32 divisors (see below), whose sum is σ = 2614762649856. Its totient is φ = 560306280960.

The previous prime is 1327809156761. The next prime is 1327809156767. The reversal of 1327809156765 is 5676519087231.

It is not a de Polignac number, because 1327809156765 - 2² = 1327809156761 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1327809156699 and 1327809156708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1327809156761) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 486375616 + ... + 486378345.

It is an arithmetic number, because the mean of its divisors is an integer number (81711332808).

Almost surely, 2^{1327809156765} is an apocalyptic number.

1327809156765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1327809156765 is a deficient number, since it is larger than the sum of its proper divisors (1286953493091).

1327809156765 is a wasteful number, since it uses less digits than its factorization.

1327809156765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972753989.

The product of its (nonzero) digits is 19051200, while the sum is 60.

The spelling of 1327809156765 in words is "one trillion, three hundred twenty-seven billion, eight hundred nine million, one hundred fifty-six thousand, seven hundred sixty-five".