7843438776996 has 81 divisors (see below), whose sum is σ = 21062103994659. Its totient is φ = 2460597055488.

The previous prime is 7843438776991. The next prime is 7843438776997. The reversal of 7843438776996 is 6996778343487.

The square root of 7843438776996 is 2800614.

It is a perfect power (a square), and thus also a powerful number.

7843438776996 is a `hidden beast` number, since 7 + 8 + 434 + 38 + 7 + 7 + 69 + 96 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 583216306596 + 7260222470400 = 763686^2 + 2694480^2 .

It is not an unprimeable number, because it can be changed into a prime (7843438776991) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 285648900 + ... + 285676356.

Almost surely, 2^{7843438776996} is an apocalyptic number.

7843438776996 is the 2800614-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7843438776996

7843438776996 is an abundant number, since it is smaller than the sum of its proper divisors (13218665217663).

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

7843438776996 is an equidigital number, since it uses as much as digits as its factorization.

7843438776996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54958 (or 27479 counting only the distinct ones).

The product of its digits is 9217732608, while the sum is 81.

Multiplying 7843438776996 by its sum of digits (81), we get a square (635318540936676 = 25205526²).

The spelling of 7843438776996 in words is "seven trillion, eight hundred forty-three billion, four hundred thirty-eight million, seven hundred seventy-six thousand, nine hundred ninety-six".