1812080458709 has 2 divisors, whose sum is σ = 1812080458710. Its totient is φ = 1812080458708.

The previous prime is 1812080458681. The next prime is 1812080458843. The reversal of 1812080458709 is 9078540802181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1355885580625 + 456194878084 = 1164425^2 + 675422^2 .

It is a cyclic number.

It is not a de Polignac number, because 1812080458709 - 2²⁸ = 1811812023253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1812080458609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 906040229354 + 906040229355.

It is an arithmetic number, because the mean of its divisors is an integer number (906040229355).

Almost surely, 2^{1812080458709} is an apocalyptic number.

It is an amenable number.

1812080458709 is a deficient number, since it is larger than the sum of its proper divisors (1).

1812080458709 is an equidigital number, since it uses as much as digits as its factorization.

1812080458709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1290240, while the sum is 53.

The spelling of 1812080458709 in words is "one trillion, eight hundred twelve billion, eighty million, four hundred fifty-eight thousand, seven hundred nine".