1820609713045 has 4 divisors (see below), whose sum is σ = 2184731655660. Its totient is φ = 1456487770432.

The previous prime is 1820609713037. The next prime is 1820609713061. The reversal of 1820609713045 is 5403179060281.

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 388181333764 + 1432428379281 = 623042^2 + 1196841^2 .

It is a cyclic number.

It is not a de Polignac number, because 1820609713045 - 2³ = 1820609713037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1820609712986 and 1820609713004.

It is a congruent number.

It is an unprimeable number.

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, 182060971300 + ... + 182060971309.

It is an arithmetic number, because the mean of its divisors is an integer number (546182913915).

It is a 1-persistent number, because it is pandigital, but 2⋅1820609713045 = 3641219426090 is not.

Almost surely, 2^{1820609713045} is an apocalyptic number.

It is an amenable number.

1820609713045 is a deficient number, since it is larger than the sum of its proper divisors (364121942615).

1820609713045 is an equidigital number, since it uses as much as digits as its factorization.

1820609713045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364121942614.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 1820609713045 in words is "one trillion, eight hundred twenty billion, six hundred nine million, seven hundred thirteen thousand, forty-five".