7811835021312 has 864 divisors, whose sum is σ = 26700253594560. Its totient is φ = 1988957306880.

The previous prime is 7811835021251. The next prime is 7811835021337. The reversal of 7811835021312 is 2131205381187.

It is a super-2 number, since 2×7811835021312² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4486980762 + ... + 4486982502.

It is an arithmetic number, because the mean of its divisors is an integer number (30903071290).

Almost surely, 2^{7811835021312} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7811835021312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13350126797280).

7811835021312 is an abundant number, since it is smaller than the sum of its proper divisors (18888418573248).

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

7811835021312 is a wasteful number, since it uses less digits than its factorization.

7811835021312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845 (or 1789 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The spelling of 7811835021312 in words is "seven trillion, eight hundred eleven billion, eight hundred thirty-five million, twenty-one thousand, three hundred twelve".