685705563180 has 240 divisors, whose sum is σ = 2427557156640. Its totient is φ = 160499404800.

The previous prime is 685705563173. The next prime is 685705563199. The reversal of 685705563180 is 81365507586.

685705563180 is a `hidden beast` number, since 6 + 8 + 5 + 7 + 0 + 556 + 3 + 1 + 80 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 146661 + ... + 1180220.

It is an arithmetic number, because the mean of its divisors is an integer number (10114821486).

Almost surely, 2^685705563180 is an apocalyptic number.

685705563180 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 685705563180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1213778578320).

685705563180 is an abundant number, since it is smaller than the sum of its proper divisors (1741851593460).

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

685705563180 is a wasteful number, since it uses less digits than its factorization.

685705563180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326942 (or 1326931 counting only the distinct ones).

The product of its (nonzero) digits is 6048000, while the sum is 54.

The spelling of 685705563180 in words is "six hundred eighty-five billion, seven hundred five million, five hundred sixty-three thousand, one hundred eighty".