681348518 has 8 divisors (see below), whose sum is σ = 1036417680. Its totient is φ = 335875960.

The previous prime is 681348517. The next prime is 681348553. The reversal of 681348518 is 815843186.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681348511) 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, 2398973 + ... + 2399256.

It is an arithmetic number, because the mean of its divisors is an integer number (129552210).

Almost surely, 2^681348518 is an apocalyptic number.

681348518 is a deficient number, since it is larger than the sum of its proper divisors (355069162).

681348518 is a wasteful number, since it uses less digits than its factorization.

681348518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4798302.

The product of its digits is 184320, while the sum is 44.

The square root of 681348518 is about 26102.6534666497. The cubic root of 681348518 is about 879.9468451020.

The spelling of 681348518 in words is "six hundred eighty-one million, three hundred forty-eight thousand, five hundred eighteen".