681334154 has 16 divisors (see below), whose sum is σ = 1031262408. Its totient is φ = 337588992.

The previous prime is 681334139. The next prime is 681334217. The reversal of 681334154 is 451433186.

It can be written as a sum of positive squares in 4 ways, for example, as 636805225 + 44528929 = 25235^2 + 6673^2 .

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 7 ways as a sum of consecutive naturals, for example, 183662 + ... + 187334.

Almost surely, 2^681334154 is an apocalyptic number.

681334154 is a deficient number, since it is larger than the sum of its proper divisors (349928254).

681334154 is a wasteful number, since it uses less digits than its factorization.

681334154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4489.

The product of its digits is 34560, while the sum is 35.

The square root of 681334154 is about 26102.3783207584. The cubic root of 681334154 is about 879.9406614603.

The spelling of 681334154 in words is "six hundred eighty-one million, three hundred thirty-four thousand, one hundred fifty-four".