681183478 has 8 divisors (see below), whose sum is σ = 1075552920. Its totient is φ = 322665840.

The previous prime is 681183469. The next prime is 681183493. The reversal of 681183478 is 874381186.

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

It is a congruent number.

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, 8962903 + ... + 8962978.

It is an arithmetic number, because the mean of its divisors is an integer number (134444115).

Almost surely, 2^681183478 is an apocalyptic number.

681183478 is a deficient number, since it is larger than the sum of its proper divisors (394369442).

681183478 is a wasteful number, since it uses less digits than its factorization.

681183478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17925902.

The product of its digits is 258048, while the sum is 46.

The square root of 681183478 is about 26099.4919107633. The cubic root of 681183478 is about 879.8757908369.

The spelling of 681183478 in words is "six hundred eighty-one million, one hundred eighty-three thousand, four hundred seventy-eight".