681456834969792 has 112 divisors (see below), whose sum is σ = 2064535623251712. Its totient is φ = 194329673579520.

The previous prime is 681456834969791. The next prime is 681456834969851. The reversal of 681456834969792 is 297969438654186.

It is a tau number, because it is divible by the number of its divisors (112).

It is a junction number, because it is equal to n+sod(n) for n = 681456834969699 and 681456834969708.

It is not an unprimeable number, because it can be changed into a prime (681456834969791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 484035459 + ... + 485441282.

Almost surely, 2^{681456834969792} is an apocalyptic number.

It is an amenable number.

681456834969792 is an abundant number, since it is smaller than the sum of its proper divisors (1383078788281920).

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

681456834969792 is a wasteful number, since it uses less digits than its factorization.

681456834969792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969477286 (or 969477276 counting only the distinct ones).

The product of its digits is 33861058560, while the sum is 87.

The spelling of 681456834969792 in words is "six hundred eighty-one trillion, four hundred fifty-six billion, eight hundred thirty-four million, nine hundred sixty-nine thousand, seven hundred ninety-two".