681320103939 has 12 divisors (see below), whose sum is σ = 1015875137472. Its totient is φ = 439561357200.

The previous prime is 681320103913. The next prime is 681320103967. The reversal of 681320103939 is 939301023186.

It is not a de Polignac number, because 681320103939 - 2¹² = 681320099843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 681320103894 and 681320103903.

It is not an unprimeable number, because it can be changed into a prime (681320603939) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1221003492 + ... + 1221004049.

It is an arithmetic number, because the mean of its divisors is an integer number (84656261456).

Almost surely, 2^681320103939 is an apocalyptic number.

681320103939 is a deficient number, since it is larger than the sum of its proper divisors (334555033533).

681320103939 is a wasteful number, since it uses less digits than its factorization.

681320103939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2442007578 (or 2442007575 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The spelling of 681320103939 in words is "six hundred eighty-one billion, three hundred twenty million, one hundred three thousand, nine hundred thirty-nine".