685410488421 has 16 divisors (see below), whose sum is σ = 926940147840. Its totient is φ = 450413187840.

The previous prime is 685410488419. The next prime is 685410488447. The reversal of 685410488421 is 124884014586.

It is not a de Polignac number, because 685410488421 - 2¹ = 685410488419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685410488461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 734601 + ... + 1382193.

It is an arithmetic number, because the mean of its divisors is an integer number (57933759240).

Almost surely, 2^685410488421 is an apocalyptic number.

It is an amenable number.

685410488421 is a deficient number, since it is larger than the sum of its proper divisors (241529659419).

685410488421 is a wasteful number, since it uses less digits than its factorization.

685410488421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652636.

The product of its (nonzero) digits is 1966080, while the sum is 51.

The spelling of 685410488421 in words is "six hundred eighty-five billion, four hundred ten million, four hundred eighty-eight thousand, four hundred twenty-one".