681963852 has 12 divisors (see below), whose sum is σ = 1591249016. Its totient is φ = 227321280.

The previous prime is 681963851. The next prime is 681963853. The reversal of 681963852 is 258369186.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (681963851) and next prime (681963853).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (681963851) 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, 28415149 + ... + 28415172.

Almost surely, 2^681963852 is an apocalyptic number.

It is an amenable number.

681963852 is an abundant number, since it is smaller than the sum of its proper divisors (909285164).

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

681963852 is a wasteful number, since it uses less digits than its factorization.

681963852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56830328 (or 56830326 counting only the distinct ones).

The product of its digits is 622080, while the sum is 48.

The square root of 681963852 is about 26114.4376160008. The cubic root of 681963852 is about 880.2116622401.

The spelling of 681963852 in words is "six hundred eighty-one million, nine hundred sixty-three thousand, eight hundred fifty-two".