1836398644012 has 12 divisors (see below), whose sum is σ = 3214054490080. Its totient is φ = 918097361136.

The previous prime is 1836398643997. The next prime is 1836398644019. The reversal of 1836398644012 is 2104468936381.

It is a super-2 number, since 2×1836398644012² (a number of 25 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1836398644019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25449687 + ... + 25521742.

Almost surely, 2^{1836398644012} is an apocalyptic number.

It is an amenable number.

1836398644012 is a deficient number, since it is larger than the sum of its proper divisors (1377655846068).

1836398644012 is a wasteful number, since it uses less digits than its factorization.

1836398644012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50980440 (or 50980438 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 55.

The spelling of 1836398644012 in words is "one trillion, eight hundred thirty-six billion, three hundred ninety-eight million, six hundred forty-four thousand, twelve".