681468140 has 48 divisors (see below), whose sum is σ = 1461704832. Its totient is φ = 266812416.

The previous prime is 681468121. The next prime is 681468167. The reversal of 681468140 is 41864186.

It is a junction number, because it is equal to n+sod(n) for n = 681468094 and 681468103.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198317 + ... + 201723.

It is an arithmetic number, because the mean of its divisors is an integer number (30452184).

Almost surely, 2^681468140 is an apocalyptic number.

It is an amenable number.

681468140 is an abundant number, since it is smaller than the sum of its proper divisors (780236692).

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

681468140 is a wasteful number, since it uses less digits than its factorization.

681468140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3626 (or 3624 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 681468140 is about 26104.9447423280. The cubic root of 681468140 is about 879.9983384955.

The spelling of 681468140 in words is "six hundred eighty-one million, four hundred sixty-eight thousand, one hundred forty".