681860464 has 20 divisors (see below), whose sum is σ = 1322104120. Its totient is φ = 340672320.

The previous prime is 681860453. The next prime is 681860513. The reversal of 681860464 is 464068186.

It is a self number, because there is not a number n which added to its sum of digits gives 681860464.

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, 6667 + ... + 37525.

It is an arithmetic number, because the mean of its divisors is an integer number (66105206).

Almost surely, 2^681860464 is an apocalyptic number.

It is an amenable number.

681860464 is a deficient number, since it is larger than the sum of its proper divisors (640243656).

681860464 is a wasteful number, since it uses less digits than its factorization.

681860464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32248 (or 32242 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 43.

The square root of 681860464 is about 26112.4580229438. The cubic root of 681860464 is about 880.1671789818.

The spelling of 681860464 in words is "six hundred eighty-one million, eight hundred sixty thousand, four hundred sixty-four".