7887827861812 has 12 divisors (see below), whose sum is σ = 13804066639300. Its totient is φ = 3943808822016.

The previous prime is 7887827861807. The next prime is 7887827861813. The reversal of 7887827861812 is 2181687287887.

It can be written as a sum of positive squares in 2 ways, for example, as 3297761568676 + 4590066293136 = 1815974^2 + 2142444^2 .

It is a hoax number, since the sum of its digits (73) 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 (7887827861813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26108253 + ... + 26408644.

Almost surely, 2^{7887827861812} is an apocalyptic number.

It is an amenable number.

7887827861812 is a deficient number, since it is larger than the sum of its proper divisors (5916238777488).

7887827861812 is a wasteful number, since it uses less digits than its factorization.

7887827861812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52554450 (or 52554448 counting only the distinct ones).

The product of its digits is 269746176, while the sum is 73.

The spelling of 7887827861812 in words is "seven trillion, eight hundred eighty-seven billion, eight hundred twenty-seven million, eight hundred sixty-one thousand, eight hundred twelve".