681214968 has 128 divisors (see below), whose sum is σ = 2174515200. Its totient is φ = 193560192.

The previous prime is 681214957. The next prime is 681215021. The reversal of 681214968 is 869412186.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 296721 + ... + 299007.

It is an arithmetic number, because the mean of its divisors is an integer number (16988400).

Almost surely, 2^681214968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681214968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1087257600).

681214968 is an abundant number, since it is smaller than the sum of its proper divisors (1493300232).

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

681214968 is a wasteful number, since it uses less digits than its factorization.

681214968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2506 (or 2496 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 681214968 is about 26100.0951722403. The cubic root of 681214968 is about 879.8893490350.

The spelling of 681214968 in words is "six hundred eighty-one million, two hundred fourteen thousand, nine hundred sixty-eight".