681945102 has 16 divisors (see below), whose sum is σ = 1515433680. Its totient is φ = 227315016.

The previous prime is 681945097. The next prime is 681945151. The reversal of 681945102 is 201549186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6314253 + ... + 6314360.

It is an arithmetic number, because the mean of its divisors is an integer number (94714605).

Almost surely, 2^681945102 is an apocalyptic number.

681945102 is an abundant number, since it is smaller than the sum of its proper divisors (833488578).

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

681945102 is a wasteful number, since it uses less digits than its factorization.

681945102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12628624 (or 12628618 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 681945102 is about 26114.0786167155. The cubic root of 681945102 is about 880.2035952827.

The spelling of 681945102 in words is "six hundred eighty-one million, nine hundred forty-five thousand, one hundred two".