1821846631057 has 2 divisors, whose sum is σ = 1821846631058. Its totient is φ = 1821846631056.

The previous prime is 1821846631051. The next prime is 1821846631091. The reversal of 1821846631057 is 7501366481281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1436831345041 + 385015286016 = 1198679^2 + 620496^2 .

It is a cyclic number.

It is not a de Polignac number, because 1821846631057 - 2¹⁵ = 1821846598289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1821846630995 and 1821846631013.

It is not a weakly prime, because it can be changed into another prime (1821846631051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 910923315528 + 910923315529.

It is an arithmetic number, because the mean of its divisors is an integer number (910923315529).

Almost surely, 2^{1821846631057} is an apocalyptic number.

It is an amenable number.

1821846631057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1821846631057 is an equidigital number, since it uses as much as digits as its factorization.

1821846631057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 1821846631057 in words is "one trillion, eight hundred twenty-one billion, eight hundred forty-six million, six hundred thirty-one thousand, fifty-seven".