838683621854 has 32 divisors (see below), whose sum is σ = 1448181370944. Its totient is φ = 361224357120.

The previous prime is 838683621851. The next prime is 838683621871. The reversal of 838683621854 is 458126386838.

It is a happy number.

It is a super-2 number, since 2×838683621854² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (838683621851) 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, 17078909 + ... + 17127944.

It is an arithmetic number, because the mean of its divisors is an integer number (45255667842).

Almost surely, 2^838683621854 is an apocalyptic number.

838683621854 is a deficient number, since it is larger than the sum of its proper divisors (609497749090).

838683621854 is a wasteful number, since it uses less digits than its factorization.

838683621854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34206932.

The product of its digits is 53084160, while the sum is 62.

The spelling of 838683621854 in words is "eight hundred thirty-eight billion, six hundred eighty-three million, six hundred twenty-one thousand, eight hundred fifty-four".