681405532 has 12 divisors (see below), whose sum is σ = 1203604920. Its totient is φ = 337518416.

The previous prime is 681405523. The next prime is 681405533. The reversal of 681405532 is 235504186.

681405532 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681405533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 795607 + ... + 796462.

It is an arithmetic number, because the mean of its divisors is an integer number (100300410).

Almost surely, 2^681405532 is an apocalyptic number.

It is an amenable number.

681405532 is a deficient number, since it is larger than the sum of its proper divisors (522199388).

681405532 is a wasteful number, since it uses less digits than its factorization.

681405532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592180 (or 1592178 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 681405532 is about 26103.7455549965. The cubic root of 681405532 is about 879.9713885326.

The spelling of 681405532 in words is "six hundred eighty-one million, four hundred five thousand, five hundred thirty-two".