1617786324641 has 4 divisors (see below), whose sum is σ = 1619993400852. Its totient is φ = 1615579248432.

The previous prime is 1617786324607. The next prime is 1617786324779. The reversal of 1617786324641 is 1464236877161.

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 1272429120400 + 345357204241 = 1128020^2 + 587671^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1617786324641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1617786324041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1103537006 + ... + 1103538471.

It is an arithmetic number, because the mean of its divisors is an integer number (404998350213).

Almost surely, 2^{1617786324641} is an apocalyptic number.

It is an amenable number.

1617786324641 is a deficient number, since it is larger than the sum of its proper divisors (2207076211).

1617786324641 is an equidigital number, since it uses as much as digits as its factorization.

1617786324641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2207076210.

The product of its digits is 8128512, while the sum is 56.

The spelling of 1617786324641 in words is "one trillion, six hundred seventeen billion, seven hundred eighty-six million, three hundred twenty-four thousand, six hundred forty-one".