681060164 has 12 divisors (see below), whose sum is σ = 1193803884. Its totient is φ = 339973344.

The previous prime is 681060161. The next prime is 681060209. The reversal of 681060164 is 461060186.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 29789764 + 651270400 = 5458^2 + 25520^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 681060164.

It is not an unprimeable number, because it can be changed into a prime (681060161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136427 + ... + 141330.

It is an arithmetic number, because the mean of its divisors is an integer number (99483657).

Almost surely, 2^681060164 is an apocalyptic number.

It is an amenable number.

681060164 is a deficient number, since it is larger than the sum of its proper divisors (512743720).

681060164 is a wasteful number, since it uses less digits than its factorization.

681060164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278374 (or 278372 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 681060164 is about 26097.1294206853. The cubic root of 681060164 is about 879.8226932723.

The spelling of 681060164 in words is "six hundred eighty-one million, sixty thousand, one hundred sixty-four".