681418429246656 has 140 divisors (see below), whose sum is σ = 2020004223913368. Its totient is φ = 227131995138048.

The previous prime is 681418429246637. The next prime is 681418429246673. The reversal of 681418429246656 is 656642924814186.

681418429246656 is a `hidden beast` number, since 6 + 8 + 14 + 1 + 84 + 29 + 2 + 466 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 156361735 + ... + 160660601.

Almost surely, 2^{681418429246656} is an apocalyptic number.

It is an amenable number.

681418429246656 is an abundant number, since it is smaller than the sum of its proper divisors (1338585794666712).

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

681418429246656 is a wasteful number, since it uses less digits than its factorization.

681418429246656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4329468 (or 4329449 counting only the distinct ones).

The product of its digits is 955514880, while the sum is 72.

The spelling of 681418429246656 in words is "six hundred eighty-one trillion, four hundred eighteen billion, four hundred twenty-nine million, two hundred forty-six thousand, six hundred fifty-six".