1812267828709 has 16 divisors (see below), whose sum is σ = 2014811366400. Its totient is φ = 1618753754880.

The previous prime is 1812267828671. The next prime is 1812267828733. The reversal of 1812267828709 is 9078287622181.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1812267828709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812267828769) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4416717 + ... + 4809565.

It is an arithmetic number, because the mean of its divisors is an integer number (125925710400).

Almost surely, 2^{1812267828709} is an apocalyptic number.

It is an amenable number.

1812267828709 is a deficient number, since it is larger than the sum of its proper divisors (202543537691).

1812267828709 is a wasteful number, since it uses less digits than its factorization.

1812267828709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404340.

The product of its (nonzero) digits is 10838016, while the sum is 61.

The spelling of 1812267828709 in words is "one trillion, eight hundred twelve billion, two hundred sixty-seven million, eight hundred twenty-eight thousand, seven hundred nine".