8505725770 has 16 divisors (see below), whose sum is σ = 16210912968. Its totient is φ = 3202155520.

The previous prime is 8505725741. The next prime is 8505725771. The reversal of 8505725770 is 775275058.

It can be written as a sum of positive squares in 4 ways, for example, as 6385767921 + 2119957849 = 79911^2 + 46043^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8505725770.

It is not an unprimeable number, because it can be changed into a prime (8505725771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25016671 + ... + 25017010.

Almost surely, 2^8505725770 is an apocalyptic number.

8505725770 is a deficient number, since it is larger than the sum of its proper divisors (7705187198).

8505725770 is a wasteful number, since it uses less digits than its factorization.

8505725770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50033705.

The product of its (nonzero) digits is 686000, while the sum is 46.

The square root of 8505725770 is about 92226.4916930054. The cubic root of 8505725770 is about 2041.2856955206.

The spelling of 8505725770 in words is "eight billion, five hundred five million, seven hundred twenty-five thousand, seven hundred seventy".