681188602 has 8 divisors (see below), whose sum is σ = 1026626112. Its totient is φ = 338979900.

The previous prime is 681188597. The next prime is 681188609. The reversal of 681188602 is 206881186.

681188602 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×681188602² = 928035822989428808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (681188609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 806674 + ... + 807517.

It is an arithmetic number, because the mean of its divisors is an integer number (128328264).

Almost surely, 2^681188602 is an apocalyptic number.

681188602 is a deficient number, since it is larger than the sum of its proper divisors (345437510).

681188602 is a wasteful number, since it uses less digits than its factorization.

681188602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614404.

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 681188602 is about 26099.5900734092. The cubic root of 681188602 is about 879.8779970326.

The spelling of 681188602 in words is "six hundred eighty-one million, one hundred eighty-eight thousand, six hundred two".