681348960 has 72 divisors (see below), whose sum is σ = 2325108240. Its totient is φ = 181692672.

The previous prime is 681348953. The next prime is 681348991. The reversal of 681348960 is 69843186.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 235140 + ... + 238019.

It is an arithmetic number, because the mean of its divisors is an integer number (32293170).

Almost surely, 2^681348960 is an apocalyptic number.

681348960 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

681348960 is an abundant number, since it is smaller than the sum of its proper divisors (1643759280).

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

681348960 is a wasteful number, since it uses less digits than its factorization.

681348960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473180 (or 473169 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 681348960 is about 26102.6619332205. The cubic root of 681348960 is about 879.9470353798.

The spelling of 681348960 in words is "six hundred eighty-one million, three hundred forty-eight thousand, nine hundred sixty".