681082544 has 10 divisors (see below), whose sum is σ = 1319597460. Its totient is φ = 340541264.

The previous prime is 681082541. The next prime is 681082553. The reversal of 681082544 is 445280186.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 681082498 and 681082507.

It is not an unprimeable number, because it can be changed into a prime (681082541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21283814 + ... + 21283845.

It is an arithmetic number, because the mean of its divisors is an integer number (131959746).

Almost surely, 2^681082544 is an apocalyptic number.

It is an amenable number.

681082544 is a deficient number, since it is larger than the sum of its proper divisors (638514916).

681082544 is a wasteful number, since it uses less digits than its factorization.

681082544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42567667 (or 42567661 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 38.

The square root of 681082544 is about 26097.5581999543. The cubic root of 681082544 is about 879.8323303143.

The spelling of 681082544 in words is "six hundred eighty-one million, eighty-two thousand, five hundred forty-four".