1812689570349 has 120 divisors (see below), whose sum is σ = 3107260533312. Its totient is φ = 1018036293120.

The previous prime is 1812689570347. The next prime is 1812689570359. The reversal of 1812689570349 is 9430759862181.

1812689570349 is a `hidden beast` number, since 1 + 8 + 1 + 26 + 8 + 9 + 570 + 34 + 9 = 666.

It is not a de Polignac number, because 1812689570349 - 2¹ = 1812689570347 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812689570347) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 541584694 + ... + 541588040.

It is a 2-persistent number, because it is pandigital, and so is 2⋅1812689570349 = 3625379140698, but 3⋅1812689570349 = 5438068711047 is not.

Almost surely, 2^{1812689570349} is an apocalyptic number.

It is an amenable number.

1812689570349 is a deficient number, since it is larger than the sum of its proper divisors (1294570962963).

1812689570349 is an equidigital number, since it uses as much as digits as its factorization.

1812689570349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3805 (or 3781 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 63.

The spelling of 1812689570349 in words is "one trillion, eight hundred twelve billion, six hundred eighty-nine million, five hundred seventy thousand, three hundred forty-nine".