838471666719 has 16 divisors (see below), whose sum is σ = 1118745965792. Its totient is φ = 558589385088.

The previous prime is 838471666649. The next prime is 838471666723. The reversal of 838471666719 is 917666174838.

838471666719 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 838471666719 - 2¹¹ = 838471664671 is a prime.

It is a super-2 number, since 2×838471666719² (a number of 25 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 838471666719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (838471666789) 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, 27700197 + ... + 27730449.

It is an arithmetic number, because the mean of its divisors is an integer number (69921622862).

Almost surely, 2^838471666719 is an apocalyptic number.

838471666719 is a deficient number, since it is larger than the sum of its proper divisors (280274299073).

838471666719 is a wasteful number, since it uses less digits than its factorization.

838471666719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36426.

The product of its digits is 73156608, while the sum is 66.

The spelling of 838471666719 in words is "eight hundred thirty-eight billion, four hundred seventy-one million, six hundred sixty-six thousand, seven hundred nineteen".