7217684117668 has 12 divisors (see below), whose sum is σ = 12632027871820. Its totient is φ = 3608533297152.

The previous prime is 7217684117587. The next prime is 7217684117701. The reversal of 7217684117668 is 8667114867127.

It can be written as a sum of positive squares in 2 ways, for example, as 5480618109184 + 1737066008484 = 2341072^2 + 1317978^2 .

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77137821 + ... + 77231332.

Almost surely, 2^{7217684117668} is an apocalyptic number.

It is an amenable number.

7217684117668 is a deficient number, since it is larger than the sum of its proper divisors (5414343754152).

7217684117668 is a wasteful number, since it uses less digits than its factorization.

7217684117668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154380846 (or 154380844 counting only the distinct ones).

The product of its digits is 37933056, while the sum is 64.

The spelling of 7217684117668 in words is "seven trillion, two hundred seventeen billion, six hundred eighty-four million, one hundred seventeen thousand, six hundred sixty-eight".