1340783776771 has 4 divisors (see below), whose sum is σ = 1351341129472. Its totient is φ = 1330226424072.

The previous prime is 1340783776769. The next prime is 1340783776823. The reversal of 1340783776771 is 1776773870431.

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 1340783776771 - 2¹ = 1340783776769 is a prime.

It is a super-2 number, since 2×1340783776771² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340783776711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5278676160 + ... + 5278676413.

It is an arithmetic number, because the mean of its divisors is an integer number (337835282368).

Almost surely, 2^{1340783776771} is an apocalyptic number.

1340783776771 is a deficient number, since it is larger than the sum of its proper divisors (10557352701).

1340783776771 is a wasteful number, since it uses less digits than its factorization.

1340783776771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10557352700.

The product of its (nonzero) digits is 29042496, while the sum is 61.

The spelling of 1340783776771 in words is "one trillion, three hundred forty billion, seven hundred eighty-three million, seven hundred seventy-six thousand, seven hundred seventy-one".