1812126613897 has 8 divisors (see below), whose sum is σ = 1831719808512. Its totient is φ = 1792620694800.

The previous prime is 1812126613889. The next prime is 1812126613909. The reversal of 1812126613897 is 7983166212181.

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

It is a cyclic number.

It is not a de Polignac number, because 1812126613897 - 2³ = 1812126613889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1812126613837) 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, 21777129 + ... + 21860182.

It is an arithmetic number, because the mean of its divisors is an integer number (228964976064).

Almost surely, 2^{1812126613897} is an apocalyptic number.

It is an amenable number.

1812126613897 is a deficient number, since it is larger than the sum of its proper divisors (19593194615).

1812126613897 is a wasteful number, since it uses less digits than its factorization.

1812126613897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43637759.

The product of its digits is 1741824, while the sum is 55.

The spelling of 1812126613897 in words is "one trillion, eight hundred twelve billion, one hundred twenty-six million, six hundred thirteen thousand, eight hundred ninety-seven".