1812336855551 has 2 divisors, whose sum is σ = 1812336855552. Its totient is φ = 1812336855550.

The previous prime is 1812336855503. The next prime is 1812336855569. The reversal of 1812336855551 is 1555586332181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1812336855551 - 2¹⁰ = 1812336854527 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1812336855493 and 1812336855502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1812336851551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 906168427775 + 906168427776.

It is an arithmetic number, because the mean of its divisors is an integer number (906168427776).

Almost surely, 2^{1812336855551} is an apocalyptic number.

1812336855551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1812336855551 is an equidigital number, since it uses as much as digits as its factorization.

1812336855551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320000, while the sum is 53.

The spelling of 1812336855551 in words is "one trillion, eight hundred twelve billion, three hundred thirty-six million, eight hundred fifty-five thousand, five hundred fifty-one".