1741642388561 has 4 divisors (see below), whose sum is σ = 1745453422692. Its totient is φ = 1737831354432.

The previous prime is 1741642388557. The next prime is 1741642388593. The reversal of 1741642388561 is 1658832461471.

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 1517232697600 + 224409690961 = 1231760^2 + 473719^2 .

It is a cyclic number.

It is not a de Polignac number, because 1741642388561 - 2² = 1741642388557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1741642388497 and 1741642388506.

It is not an unprimeable number, because it can be changed into a prime (1741642378561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1905516380 + ... + 1905517293.

It is an arithmetic number, because the mean of its divisors is an integer number (436363355673).

Almost surely, 2^{1741642388561} is an apocalyptic number.

It is an amenable number.

1741642388561 is a deficient number, since it is larger than the sum of its proper divisors (3811034131).

1741642388561 is an equidigital number, since it uses as much as digits as its factorization.

1741642388561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3811034130.

The product of its digits is 7741440, while the sum is 56.

The spelling of 1741642388561 in words is "one trillion, seven hundred forty-one billion, six hundred forty-two million, three hundred eighty-eight thousand, five hundred sixty-one".