681378696 has 32 divisors (see below), whose sum is σ = 1892719200. Its totient is φ = 227126160.

The previous prime is 681378689. The next prime is 681378757. The reversal of 681378696 is 696873186.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1577050 + ... + 1577481.

It is an arithmetic number, because the mean of its divisors is an integer number (59147475).

Almost surely, 2^681378696 is an apocalyptic number.

It is an amenable number.

681378696 is an abundant number, since it is smaller than the sum of its proper divisors (1211340504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681378696 is a wasteful number, since it uses less digits than its factorization.

681378696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3154546 (or 3154536 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 681378696 is about 26103.2315240853. The cubic root of 681378696 is about 879.9598363212.

The spelling of 681378696 in words is "six hundred eighty-one million, three hundred seventy-eight thousand, six hundred ninety-six".