685081152 has 504 divisors, whose sum is σ = 2529596160. Its totient is φ = 182891520.

The previous prime is 685081069. The next prime is 685081217. The reversal of 685081152 is 251180586.

It is a tau number, because it is divible by the number of its divisors (504).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 22099377 + ... + 22099407.

It is an arithmetic number, because the mean of its divisors is an integer number (5019040).

Almost surely, 2^685081152 is an apocalyptic number.

685081152 is a gapful number since it is divisible by the number (62) 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 685081152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1264798080).

685081152 is an abundant number, since it is smaller than the sum of its proper divisors (1844515008).

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

685081152 is a wasteful number, since it uses less digits than its factorization.

685081152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 36.

The square root of 685081152 is about 26174.0549399592. The cubic root of 685081152 is about 881.5507916623.

The spelling of 685081152 in words is "six hundred eighty-five million, eighty-one thousand, one hundred fifty-two".