681693783219 has 32 divisors (see below), whose sum is σ = 1083971903040. Its totient is φ = 421870104576.

The previous prime is 681693783193. The next prime is 681693783223. The reversal of 681693783219 is 912387396186.

681693783219 is a `hidden beast` number, since 68 + 169 + 378 + 32 + 19 = 666.

It is not a de Polignac number, because 681693783219 - 2¹⁹ = 681693258931 is a prime.

It is a super-2 number, since 2×681693783219² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (681693783319) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10138902 + ... + 10205915.

It is an arithmetic number, because the mean of its divisors is an integer number (33874121970).

Almost surely, 2^681693783219 is an apocalyptic number.

681693783219 is a deficient number, since it is larger than the sum of its proper divisors (402278119821).

681693783219 is a wasteful number, since it uses less digits than its factorization.

681693783219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20344916 (or 20344910 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The spelling of 681693783219 in words is "six hundred eighty-one billion, six hundred ninety-three million, seven hundred eighty-three thousand, two hundred nineteen".