391266068869 has 16 divisors (see below), whose sum is σ = 426307432320. Its totient is φ = 356955278400.

The previous prime is 391266068857. The next prime is 391266068917. The reversal of 391266068869 is 968860662193.

It is a cyclic number.

It is not a de Polignac number, because 391266068869 - 2⁷ = 391266068741 is a prime.

It is a super-2 number, since 2×391266068869² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 391266068869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391266068839) 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, 119179 + ... + 892600.

It is an arithmetic number, because the mean of its divisors is an integer number (26644214520).

Almost surely, 2^391266068869 is an apocalyptic number.

It is an amenable number.

391266068869 is a deficient number, since it is larger than the sum of its proper divisors (35041363451).

391266068869 is a wasteful number, since it uses less digits than its factorization.

391266068869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012140.

The product of its (nonzero) digits is 40310784, while the sum is 64.

The spelling of 391266068869 in words is "three hundred ninety-one billion, two hundred sixty-six million, sixty-eight thousand, eight hundred sixty-nine".