681465410 has 8 divisors (see below), whose sum is σ = 1226637756. Its totient is φ = 272586160.

The previous prime is 681465409. The next prime is 681465443. The reversal of 681465410 is 14564186.

It can be written as a sum of positive squares in 2 ways, for example, as 660130249 + 21335161 = 25693^2 + 4619^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34073261 + ... + 34073280.

Almost surely, 2^681465410 is an apocalyptic number.

681465410 is a deficient number, since it is larger than the sum of its proper divisors (545172346).

681465410 is a wasteful number, since it uses less digits than its factorization.

681465410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68146548.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 681465410 is about 26104.8924533314. The cubic root of 681465410 is about 879.9971633862.

The spelling of 681465410 in words is "six hundred eighty-one million, four hundred sixty-five thousand, four hundred ten".