678481851 has 16 divisors (see below), whose sum is σ = 911720448. Its totient is φ = 448795200.

The previous prime is 678481847. The next prime is 678481871. The reversal of 678481851 is 158184876.

It is a happy number.

It is not a de Polignac number, because 678481851 - 2² = 678481847 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 678481851.

It is not an unprimeable number, because it can be changed into a prime (678481831) by changing a digit.

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, 260566 + ... + 263156.

It is an arithmetic number, because the mean of its divisors is an integer number (56982528).

Almost surely, 2^678481851 is an apocalyptic number.

678481851 is a deficient number, since it is larger than the sum of its proper divisors (233238597).

678481851 is a wasteful number, since it uses less digits than its factorization.

678481851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3242.

The product of its digits is 430080, while the sum is 48.

The square root of 678481851 is about 26047.6841772930. The cubic root of 678481851 is about 878.7110308782.

The spelling of 678481851 in words is "six hundred seventy-eight million, four hundred eighty-one thousand, eight hundred fifty-one".