10391394668 has 6 divisors (see below), whose sum is σ = 18184940676. Its totient is φ = 5195697332.

The previous prime is 10391394623. The next prime is 10391394677. The reversal of 10391394668 is 86649319301.

It is a super-2 number, since 2×10391394668² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1298924330 + ... + 1298924337.

It is an arithmetic number, because the mean of its divisors is an integer number (3030823446).

Almost surely, 2^10391394668 is an apocalyptic number.

It is an amenable number.

10391394668 is a deficient number, since it is larger than the sum of its proper divisors (7793546008).

10391394668 is a wasteful number, since it uses less digits than its factorization.

10391394668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2597848671 (or 2597848669 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 50.

The spelling of 10391394668 in words is "ten billion, three hundred ninety-one million, three hundred ninety-four thousand, six hundred sixty-eight".