681302506 has 32 divisors (see below), whose sum is σ = 1108484352. Its totient is φ = 312829440.

The previous prime is 681302483. The next prime is 681302533. The reversal of 681302506 is 605203186.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 985621 + ... + 986311.

It is an arithmetic number, because the mean of its divisors is an integer number (34640136).

Almost surely, 2^681302506 is an apocalyptic number.

681302506 is a deficient number, since it is larger than the sum of its proper divisors (427181846).

681302506 is a wasteful number, since it uses less digits than its factorization.

681302506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 681302506 is about 26101.7720854351. The cubic root of 681302506 is about 879.9270368225.

The spelling of 681302506 in words is "six hundred eighty-one million, three hundred two thousand, five hundred six".