1817782934761 has 4 divisors (see below), whose sum is σ = 1818423678852. Its totient is φ = 1817142190672.

The previous prime is 1817782934753. The next prime is 1817782934857. The reversal of 1817782934761 is 1674392877181.

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 820031669136 + 997751265625 = 905556^2 + 998875^2 .

It is a cyclic number.

It is not a de Polignac number, because 1817782934761 - 2³ = 1817782934753 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1817782934693 and 1817782934702.

It is not an unprimeable number, because it can be changed into a prime (1817782134761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320367790 + ... + 320373463.

It is an arithmetic number, because the mean of its divisors is an integer number (454605919713).

Almost surely, 2^{1817782934761} is an apocalyptic number.

It is an amenable number.

1817782934761 is a deficient number, since it is larger than the sum of its proper divisors (640744091).

1817782934761 is an equidigital number, since it uses as much as digits as its factorization.

1817782934761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640744090.

The product of its digits is 28449792, while the sum is 64.

The spelling of 1817782934761 in words is "one trillion, eight hundred seventeen billion, seven hundred eighty-two million, nine hundred thirty-four thousand, seven hundred sixty-one".