681487074 has 64 divisors (see below), whose sum is σ = 1573831680. Its totient is φ = 218350080.

The previous prime is 681487073. The next prime is 681487099. The reversal of 681487074 is 470784186.

681487074 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (681487073) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 261522 + ... + 264114.

It is an arithmetic number, because the mean of its divisors is an integer number (24591120).

Almost surely, 2^681487074 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681487074, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (786915840).

681487074 is an abundant number, since it is smaller than the sum of its proper divisors (892344606).

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

681487074 is a wasteful number, since it uses less digits than its factorization.

681487074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2792 (or 2786 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The square root of 681487074 is about 26105.3073914099. The cubic root of 681487074 is about 880.0064884163.

The spelling of 681487074 in words is "six hundred eighty-one million, four hundred eighty-seven thousand, seventy-four".