681076564 has 12 divisors (see below), whose sum is σ = 1362153184. Its totient is φ = 291889944.

The previous prime is 681076547. The next prime is 681076567. The reversal of 681076564 is 465670186.

It is a happy number.

681076564 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 681076564.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681076567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12162054 + ... + 12162109.

Almost surely, 2^681076564 is an apocalyptic number.

It is an amenable number.

681076564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

681076564 is a wasteful number, since it uses less digits than its factorization.

681076564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24324174 (or 24324172 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 681076564 is about 26097.4436295971. The cubic root of 681076564 is about 879.8297552897.

The spelling of 681076564 in words is "six hundred eighty-one million, seventy-six thousand, five hundred sixty-four".