391266068871 has 8 divisors (see below), whose sum is σ = 528291738880. Its totient is φ = 257542222392.

The previous prime is 391266068857. The next prime is 391266068917. The reversal of 391266068871 is 178860662193.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 391266068871 - 2⁵ = 391266068839 is a prime.

It is a super-2 number, since 2×391266068871² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391266069871) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 825455605 + ... + 825456078.

It is an arithmetic number, because the mean of its divisors is an integer number (66036467360).

Almost surely, 2^391266068871 is an apocalyptic number.

391266068871 is a deficient number, since it is larger than the sum of its proper divisors (137025670009).

391266068871 is a wasteful number, since it uses less digits than its factorization.

391266068871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650911765.

The product of its (nonzero) digits is 5225472, while the sum is 57.

The spelling of 391266068871 in words is "three hundred ninety-one billion, two hundred sixty-six million, sixty-eight thousand, eight hundred seventy-one".