85810725 has 192 divisors, whose sum is σ = 213319680. Its totient is φ = 32659200.

The previous prime is 85810717. The next prime is 85810729. The reversal of 85810725 is 52701858.

85810725 is a `hidden beast` number, since 8 + 581 + 0 + 72 + 5 = 666.

It is not a de Polignac number, because 85810725 - 2³ = 85810717 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 85810725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85810729) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 675612 + ... + 675738.

It is an arithmetic number, because the mean of its divisors is an integer number (1111040).

Almost surely, 2^85810725 is an apocalyptic number.

It is an amenable number.

85810725 is an abundant number, since it is smaller than the sum of its proper divisors (127508955).

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

85810725 is a wasteful number, since it uses less digits than its factorization.

85810725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 85810725 is about 9263.4078502460. The cubic root of 85810725 is about 441.0764363784.

The spelling of 85810725 in words is "eighty-five million, eight hundred ten thousand, seven hundred twenty-five".