681714512 has 10 divisors (see below), whose sum is σ = 1320821898. Its totient is φ = 340857248.

The previous prime is 681714511. The next prime is 681714557. The reversal of 681714512 is 215417186.

It can be written as a sum of positive squares in only one way, i.e., 640292416 + 41422096 = 25304^2 + 6436^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681714511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21303563 + ... + 21303594.

Almost surely, 2^681714512 is an apocalyptic number.

It is an amenable number.

681714512 is a deficient number, since it is larger than the sum of its proper divisors (639107386).

681714512 is a wasteful number, since it uses less digits than its factorization.

681714512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42607165 (or 42607159 counting only the distinct ones).

The product of its digits is 13440, while the sum is 35.

The square root of 681714512 is about 26109.6631920061. The cubic root of 681714512 is about 880.1043746722.

The spelling of 681714512 in words is "six hundred eighty-one million, seven hundred fourteen thousand, five hundred twelve".