681815300 has 36 divisors (see below), whose sum is σ = 1503807396. Its totient is φ = 268252800.

The previous prime is 681815297. The next prime is 681815327. The reversal of 681815300 is 3518186.

It can be written as a sum of positive squares in 6 ways, for example, as 225480256 + 456335044 = 15016^2 + 21362^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49787 + ... + 61986.

Almost surely, 2^681815300 is an apocalyptic number.

It is an amenable number.

681815300 is an abundant number, since it is smaller than the sum of its proper divisors (821992096).

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

681815300 is a wasteful number, since it uses less digits than its factorization.

681815300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111848 (or 111841 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 681815300 is about 26111.5932106794. The cubic root of 681815300 is about 880.1477455100.

The spelling of 681815300 in words is "six hundred eighty-one million, eight hundred fifteen thousand, three hundred".