681725016 has 96 divisors (see below), whose sum is σ = 2221190400. Its totient is φ = 184524480.

The previous prime is 681725003. The next prime is 681725017. The reversal of 681725016 is 610527186.

681725016 is a `hidden beast` number, since 6 + 81 + 72 + 501 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681725017) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 26020 + ... + 45171.

It is an arithmetic number, because the mean of its divisors is an integer number (23137400).

Almost surely, 2^681725016 is an apocalyptic number.

It is an amenable number.

681725016 is an abundant number, since it is smaller than the sum of its proper divisors (1539465384).

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

681725016 is a wasteful number, since it uses less digits than its factorization.

681725016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71229 (or 71222 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 681725016 is about 26109.8643428111. The cubic root of 681725016 is about 880.1088949265.

The spelling of 681725016 in words is "six hundred eighty-one million, seven hundred twenty-five thousand, sixteen".