681576120058 has 4 divisors (see below), whose sum is σ = 1022364180090. Its totient is φ = 340788060028.

The previous prime is 681576120047. The next prime is 681576120077. The reversal of 681576120058 is 850021675186.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 644123420329 + 37452699729 = 802573^2 + 193527^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 681576119993 and 681576120020.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170394030013 + ... + 170394030016.

Almost surely, 2^681576120058 is an apocalyptic number.

681576120058 is a deficient number, since it is larger than the sum of its proper divisors (340788060032).

681576120058 is a wasteful number, since it uses less digits than its factorization.

681576120058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340788060031.

The product of its (nonzero) digits is 806400, while the sum is 49.

The spelling of 681576120058 in words is "six hundred eighty-one billion, five hundred seventy-six million, one hundred twenty thousand, fifty-eight".