104493207681 has 10 divisors (see below), whose sum is σ = 156094791842. Its totient is φ = 69662138400.

The previous prime is 104493207677. The next prime is 104493207683. The reversal of 104493207681 is 186702394401.

104493207681 is a `hidden beast` number, since 10 + 4 + 493 + 2 + 0 + 76 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 56663517681 + 47829690000 = 238041^2 + 218700^2 .

It is not a de Polignac number, because 104493207681 - 2² = 104493207677 is a prime.

It is a super-2 number, since 2×104493207681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (104493207683) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 645019720 + ... + 645019881.

Almost surely, 2^104493207681 is an apocalyptic number.

It is an amenable number.

104493207681 is a deficient number, since it is larger than the sum of its proper divisors (51601584161).

104493207681 is an equidigital number, since it uses as much as digits as its factorization.

104493207681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290039613 (or 1290039604 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 104493207681 in words is "one hundred four billion, four hundred ninety-three million, two hundred seven thousand, six hundred eighty-one".