1882782465561 has 12 divisors (see below), whose sum is σ = 2744524900260. Its totient is φ = 1243672820640.

The previous prime is 1882782465559. The next prime is 1882782465583. The reversal of 1882782465561 is 1655642872881.

1882782465561 is a `hidden beast` number, since 1 + 8 + 8 + 2 + 7 + 8 + 2 + 4 + 65 + 561 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 614861425161 + 1267921040400 = 784131^2 + 1126020^2 .

It is not a de Polignac number, because 1882782465561 - 2¹ = 1882782465559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1882782465521) 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 11 ways as a sum of consecutive naturals, for example, 959623110 + ... + 959625071.

It is an arithmetic number, because the mean of its divisors is an integer number (228710408355).

Almost surely, 2^{1882782465561} is an apocalyptic number.

It is an amenable number.

1882782465561 is a deficient number, since it is larger than the sum of its proper divisors (861742434699).

1882782465561 is a wasteful number, since it uses less digits than its factorization.

1882782465561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1919248296 (or 1919248293 counting only the distinct ones).

The product of its digits is 51609600, while the sum is 63.

The spelling of 1882782465561 in words is "one trillion, eight hundred eighty-two billion, seven hundred eighty-two million, four hundred sixty-five thousand, five hundred sixty-one".