681543285 has 16 divisors (see below), whose sum is σ = 1093145280. Its totient is φ = 362597760.

The previous prime is 681543263. The next prime is 681543323. The reversal of 681543285 is 582345186.

It is not a de Polignac number, because 681543285 - 2¹⁰ = 681542261 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49411 + ... + 61680.

It is an arithmetic number, because the mean of its divisors is an integer number (68321580).

Almost surely, 2^681543285 is an apocalyptic number.

It is an amenable number.

681543285 is a deficient number, since it is larger than the sum of its proper divisors (411601995).

681543285 is a wasteful number, since it uses less digits than its factorization.

681543285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111508.

The product of its digits is 230400, while the sum is 42.

The square root of 681543285 is about 26106.3839893617. The cubic root of 681543285 is about 880.0306829006.

The spelling of 681543285 in words is "six hundred eighty-one million, five hundred forty-three thousand, two hundred eighty-five".