681437456 has 40 divisors (see below), whose sum is σ = 1511153280. Its totient is φ = 291608064.

The previous prime is 681437441. The next prime is 681437461. The reversal of 681437456 is 654734186.

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, 77240 + ... + 85608.

It is an arithmetic number, because the mean of its divisors is an integer number (37778832).

Almost surely, 2^681437456 is an apocalyptic number.

It is an amenable number.

681437456 is an abundant number, since it is smaller than the sum of its proper divisors (829715824).

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

681437456 is a wasteful number, since it uses less digits than its factorization.

681437456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9111 (or 9105 counting only the distinct ones).

The product of its digits is 483840, while the sum is 44.

The square root of 681437456 is about 26104.3570309632. The cubic root of 681437456 is about 879.9851306027.

The spelling of 681437456 in words is "six hundred eighty-one million, four hundred thirty-seven thousand, four hundred fifty-six".