1821846631091 has 2 divisors, whose sum is σ = 1821846631092. Its totient is φ = 1821846631090.

The previous prime is 1821846631057. The next prime is 1821846631097. The reversal of 1821846631091 is 1901366481281.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1821846631091 - 2¹⁰ = 1821846630067 is a prime.

It is not a weakly prime, because it can be changed into another prime (1821846631097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 910923315545 + 910923315546.

It is an arithmetic number, because the mean of its divisors is an integer number (910923315546).

Almost surely, 2^{1821846631091} is an apocalyptic number.

1821846631091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1821846631091 is an equidigital number, since it uses as much as digits as its factorization.

1821846631091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 497664, while the sum is 50.

The spelling of 1821846631091 in words is "one trillion, eight hundred twenty-one billion, eight hundred forty-six million, six hundred thirty-one thousand, ninety-one".