1861441411 has 2 divisors, whose sum is σ = 1861441412. Its totient is φ = 1861441410.

The previous prime is 1861441409. The next prime is 1861441447. The reversal of 1861441411 is 1141441681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1861441411 - 2¹ = 1861441409 is a prime.

Together with 1861441409, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1861441481) 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 as a sum of consecutive naturals, namely, 930720705 + 930720706.

It is an arithmetic number, because the mean of its divisors is an integer number (930720706).

Almost surely, 2^1861441411 is an apocalyptic number.

1861441411 is a deficient number, since it is larger than the sum of its proper divisors (1).

1861441411 is an equidigital number, since it uses as much as digits as its factorization.

1861441411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3072, while the sum is 31.

The square root of 1861441411 is about 43144.4250280381. The cubic root of 1861441411 is about 1230.1265454662.

It can be divided in two parts, 18614 and 41411, that added together give a square (60025 = 245²).

The spelling of 1861441411 in words is "one billion, eight hundred sixty-one million, four hundred forty-one thousand, four hundred eleven".