681546106 has 8 divisors (see below), whose sum is σ = 1028831220. Its totient is φ = 338602368.

The previous prime is 681546101. The next prime is 681546109. The reversal of 681546106 is 601645186.

It can be written as a sum of positive squares in 2 ways, for example, as 663526081 + 18020025 = 25759^2 + 4245^2 .

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

It is a super-3 number, since 3×681546106³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (681546101) 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, 1084951 + ... + 1085578.

Almost surely, 2^681546106 is an apocalyptic number.

681546106 is a deficient number, since it is larger than the sum of its proper divisors (347285114).

681546106 is a wasteful number, since it uses less digits than its factorization.

681546106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170688.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 681546106 is about 26106.4380182360. The cubic root of 681546106 is about 880.0318970876.

The spelling of 681546106 in words is "six hundred eighty-one million, five hundred forty-six thousand, one hundred six".