681436752 has 40 divisors (see below), whose sum is σ = 1761312864. Its totient is φ = 227025024.

The previous prime is 681436739. The next prime is 681436753. The reversal of 681436752 is 257634186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681436753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177283 + ... + 181085.

Almost surely, 2^681436752 is an apocalyptic number.

It is an amenable number.

681436752 is an abundant number, since it is smaller than the sum of its proper divisors (1079876112).

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

681436752 is a wasteful number, since it uses less digits than its factorization.

681436752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7547 (or 7541 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 681436752 is about 26104.3435466207. The cubic root of 681436752 is about 879.9848275621.

The spelling of 681436752 in words is "six hundred eighty-one million, four hundred thirty-six thousand, seven hundred fifty-two".