681895500 has 432 divisors, whose sum is σ = 2496897312. Its totient is φ = 143616000.

The previous prime is 681895493. The next prime is 681895519. The reversal of 681895500 is 5598186.

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 143 ways as a sum of consecutive naturals, for example, 40111492 + ... + 40111508.

Almost surely, 2^681895500 is an apocalyptic number.

681895500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681895500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1248448656).

681895500 is an abundant number, since it is smaller than the sum of its proper divisors (1815001812).

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

681895500 is a wasteful number, since it uses less digits than its factorization.

681895500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91 (or 51 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 42.

The square root of 681895500 is about 26113.1288818479. The cubic root of 681895500 is about 880.1822539180.

The spelling of 681895500 in words is "six hundred eighty-one million, eight hundred ninety-five thousand, five hundred".