681512485 has 8 divisors (see below), whose sum is σ = 819090720. Its totient is φ = 544359504.

The previous prime is 681512483. The next prime is 681512497. The reversal of 681512485 is 584215186.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 681512485 - 2¹ = 681512483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681512483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102775 + ... + 109204.

It is an arithmetic number, because the mean of its divisors is an integer number (102386340).

Almost surely, 2^681512485 is an apocalyptic number.

It is an amenable number.

681512485 is a deficient number, since it is larger than the sum of its proper divisors (137578235).

681512485 is a wasteful number, since it uses less digits than its factorization.

681512485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212627.

The product of its digits is 76800, while the sum is 40.

The square root of 681512485 is about 26105.7940886693. The cubic root of 681512485 is about 880.0174260495.

The spelling of 681512485 in words is "six hundred eighty-one million, five hundred twelve thousand, four hundred eighty-five".