683581812851081 has 16 divisors (see below), whose sum is σ = 734998342823424. Its totient is φ = 633420910619904.

The previous prime is 683581812851027. The next prime is 683581812851137. The reversal of 683581812851081 is 180158218185386.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-683581812851081 is a prime.

It is a super-2 number, since 2×683581812851081² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 683581812850999 and 683581812851017.

It is not an unprimeable number, because it can be changed into a prime (683581812854081) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 162531290 + ... + 166684083.

It is an arithmetic number, because the mean of its divisors is an integer number (45937396426464).

Almost surely, 2^{683581812851081} is an apocalyptic number.

It is an amenable number.

683581812851081 is a deficient number, since it is larger than the sum of its proper divisors (51416529972343).

683581812851081 is a wasteful number, since it uses less digits than its factorization.

683581812851081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329217280.

The product of its (nonzero) digits is 29491200, while the sum is 65.

The spelling of 683581812851081 in words is "six hundred eighty-three trillion, five hundred eighty-one billion, eight hundred twelve million, eight hundred fifty-one thousand, eighty-one".