681782410 has 8 divisors (see below), whose sum is σ = 1227208356. Its totient is φ = 272712960.

The previous prime is 681782401. The next prime is 681782417. The reversal of 681782410 is 14287186.

It can be written as a sum of positive squares in 2 ways, for example, as 669101689 + 12680721 = 25867^2 + 3561^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 681782410.

It is not an unprimeable number, because it can be changed into a prime (681782417) 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, 34089111 + ... + 34089130.

Almost surely, 2^681782410 is an apocalyptic number.

681782410 is a deficient number, since it is larger than the sum of its proper divisors (545425946).

681782410 is a wasteful number, since it uses less digits than its factorization.

681782410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68178248.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 681782410 is about 26110.9634062016. The cubic root of 681782410 is about 880.1335928381.

The spelling of 681782410 in words is "six hundred eighty-one million, seven hundred eighty-two thousand, four hundred ten".