1864439894112 has 24 divisors (see below), whose sum is σ = 4894154722296. Its totient is φ = 621479964672.

The previous prime is 1864439894111. The next prime is 1864439894123. The reversal of 1864439894112 is 2114989344681.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×1864439894112² (a number of 25 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1864439894111) 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, 9710624353 + ... + 9710624544.

It is an arithmetic number, because the mean of its divisors is an integer number (203923113429).

Almost surely, 2^{1864439894112} is an apocalyptic number.

1864439894112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1864439894112 is an abundant number, since it is smaller than the sum of its proper divisors (3029714828184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1864439894112 is a wasteful number, since it uses less digits than its factorization.

1864439894112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19421248910 (or 19421248902 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 60.

The spelling of 1864439894112 in words is "one trillion, eight hundred sixty-four billion, four hundred thirty-nine million, eight hundred ninety-four thousand, one hundred twelve".