7843406324128 has 12 divisors (see below), whose sum is σ = 15441706200690. Its totient is φ = 3921703162048.

The previous prime is 7843406324087. The next prime is 7843406324147. The reversal of 7843406324128 is 8214236043487.

It can be written as a sum of positive squares in only one way, i.e., 6341673719824 + 1501732604304 = 2518268^2 + 1225452^2 .

It is a super-2 number, since 2×7843406324128² (a number of 27 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 122553223783 + ... + 122553223846.

Almost surely, 2^{7843406324128} is an apocalyptic number.

It is an amenable number.

7843406324128 is a deficient number, since it is larger than the sum of its proper divisors (7598299876562).

7843406324128 is a wasteful number, since it uses less digits than its factorization.

7843406324128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245106447639 (or 245106447631 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 52.

The spelling of 7843406324128 in words is "seven trillion, eight hundred forty-three billion, four hundred six million, three hundred twenty-four thousand, one hundred twenty-eight".