1812651082849 has 8 divisors (see below), whose sum is σ = 1908088734240. Its totient is φ = 1717216927776.

The previous prime is 1812651082843. The next prime is 1812651082871. The reversal of 1812651082849 is 9482801562181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1812651082849 - 2⁵ = 1812651082817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1812651082849.

It is not an unprimeable number, because it can be changed into a prime (1812651082843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225594 + ... + 1917340.

It is an arithmetic number, because the mean of its divisors is an integer number (238511091780).

Almost surely, 2^{1812651082849} is an apocalyptic number.

1812651082849 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1812651082849 is a deficient number, since it is larger than the sum of its proper divisors (95437651391).

1812651082849 is a wasteful number, since it uses less digits than its factorization.

1812651082849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1748159.

The product of its (nonzero) digits is 2211840, while the sum is 55.

The spelling of 1812651082849 in words is "one trillion, eight hundred twelve billion, six hundred fifty-one million, eighty-two thousand, eight hundred forty-nine".