1827284505661 has 4 divisors (see below), whose sum is σ = 1923457374400. Its totient is φ = 1731111636924.

The previous prime is 1827284505589. The next prime is 1827284505691. The reversal of 1827284505661 is 1665054827281.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1827284505661 - 2⁹ = 1827284505149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1827284505691) 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, 48086434341 + ... + 48086434378.

It is an arithmetic number, because the mean of its divisors is an integer number (480864343600).

Almost surely, 2^{1827284505661} is an apocalyptic number.

It is an amenable number.

1827284505661 is a deficient number, since it is larger than the sum of its proper divisors (96172868739).

1827284505661 is an equidigital number, since it uses as much as digits as its factorization.

1827284505661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96172868738.

The product of its (nonzero) digits is 6451200, while the sum is 55.

The spelling of 1827284505661 in words is "one trillion, eight hundred twenty-seven billion, two hundred eighty-four million, five hundred five thousand, six hundred sixty-one".