685031424000 has 1152 divisors, whose sum is σ = 2858021397504. Its totient is φ = 141557760000.

The previous prime is 685031423977. The next prime is 685031424019. The reversal of 685031424000 is 424130586.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3784703910 + ... + 3784704090.

It is an arithmetic number, because the mean of its divisors is an integer number (2480921352).

Almost surely, 2^685031424000 is an apocalyptic number.

685031424000 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 685031424000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1429010698752).

685031424000 is an abundant number, since it is smaller than the sum of its proper divisors (2172989973504).

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

685031424000 is an equidigital number, since it uses as much as digits as its factorization.

685031424000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

Adding to 685031424000 its reverse (424130586), we get a palindrome (685455554586).

The spelling of 685031424000 in words is "six hundred eighty-five billion, thirty-one million, four hundred twenty-four thousand".