7811487427812 has 12 divisors (see below), whose sum is σ = 18226803998256. Its totient is φ = 2603829142600.

The previous prime is 7811487427763. The next prime is 7811487427817. The reversal of 7811487427812 is 2187247841187.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×7811487427812² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7811487427817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 325478642814 + ... + 325478642837.

It is an arithmetic number, because the mean of its divisors is an integer number (1518900333188).

Almost surely, 2^{7811487427812} is an apocalyptic number.

It is an amenable number.

7811487427812 is an abundant number, since it is smaller than the sum of its proper divisors (10415316570444).

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

7811487427812 is a wasteful number, since it uses less digits than its factorization.

7811487427812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650957285658 (or 650957285656 counting only the distinct ones).

The product of its digits is 11239424, while the sum is 60.

The spelling of 7811487427812 in words is "seven trillion, eight hundred eleven billion, four hundred eighty-seven million, four hundred twenty-seven thousand, eight hundred twelve".