681765635033676 has 72 divisors (see below), whose sum is σ = 1779084255312000. Its totient is φ = 219907061936640.

The previous prime is 681765635033653. The next prime is 681765635033683. The reversal of 681765635033676 is 676330536567186.

681765635033676 is a `hidden beast` number, since 6 + 8 + 1 + 7 + 6 + 56 + 3 + 503 + 3 + 67 + 6 = 666.

It is a super-2 number, since 2×681765635033676² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9911151 + ... + 38232998.

It is an arithmetic number, because the mean of its divisors is an integer number (24709503546000).

Almost surely, 2^{681765635033676} is an apocalyptic number.

It is an amenable number.

681765635033676 is an abundant number, since it is smaller than the sum of its proper divisors (1097318620278324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681765635033676 is a wasteful number, since it uses less digits than its factorization.

681765635033676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48156879 (or 48156874 counting only the distinct ones).

The product of its (nonzero) digits is 2057529600, while the sum is 72.

The spelling of 681765635033676 in words is "six hundred eighty-one trillion, seven hundred sixty-five billion, six hundred thirty-five million, thirty-three thousand, six hundred seventy-six".