685951096320 has 2560 divisors, whose sum is σ = 3167797248000. Its totient is φ = 137116385280.

The previous prime is 685951096297. The next prime is 685951096361. The reversal of 685951096320 is 23690159586.

It is a happy number.

685951096320 is a `hidden beast` number, since 6 + 8 + 5 + 9 + 510 + 96 + 32 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (2560).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 8264470999 + ... + 8264471081.

It is an arithmetic number, because the mean of its divisors is an integer number (1237420800).

Almost surely, 2^685951096320 is an apocalyptic number.

685951096320 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 685951096320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1583898624000).

685951096320 is an abundant number, since it is smaller than the sum of its proper divisors (2481846151680).

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

685951096320 is a wasteful number, since it uses less digits than its factorization.

685951096320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 54.

The spelling of 685951096320 in words is "six hundred eighty-five billion, nine hundred fifty-one million, ninety-six thousand, three hundred twenty".