7947213457906 has 32 divisors (see below), whose sum is σ = 11977476166656. Its totient is φ = 3954776400000.

The previous prime is 7947213457901. The next prime is 7947213457951. The reversal of 7947213457906 is 6097543127497.

It is not an unprimeable number, because it can be changed into a prime (7947213457901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 868448431 + ... + 868457581.

It is an arithmetic number, because the mean of its divisors is an integer number (374296130208).

Almost surely, 2^{7947213457906} is an apocalyptic number.

7947213457906 is a deficient number, since it is larger than the sum of its proper divisors (4030262708750).

7947213457906 is a wasteful number, since it uses less digits than its factorization.

7947213457906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11938.

The product of its (nonzero) digits is 80015040, while the sum is 64.

The spelling of 7947213457906 in words is "seven trillion, nine hundred forty-seven billion, two hundred thirteen million, four hundred fifty-seven thousand, nine hundred six".