899585856225 has 135 divisors (see below), whose sum is σ = 1939044119331. Its totient is φ = 411102669600.

The previous prime is 899585856187. The next prime is 899585856269. The reversal of 899585856225 is 522658585998.

The square root of 899585856225 is 948465.

It is a perfect power (a square), and thus also a powerful number.

899585856225 is a `hidden beast` number, since 8 + 9 + 9 + 5 + 8 + 58 + 562 + 2 + 5 = 666.

It can be written as a sum of positive squares in only one way, i.e., 323850908241 + 575734947984 = 569079^2 + 758772^2 .

It is a tau number, because it is divible by the number of its divisors (135).

It is not a de Polignac number, because 899585856225 - 2³¹ = 897438372577 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 298764970 + ... + 298767980.

Almost surely, 2^899585856225 is an apocalyptic number.

899585856225 is the 948465-th square number.

899585856225 is the 474233-rd centered octagonal number.

It is an amenable number.

899585856225 is an abundant number, since it is smaller than the sum of its proper divisors (1039458263106).

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

899585856225 is an frugal number, since it uses more digits than its factorization.

899585856225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6058 (or 3026 counting only the distinct ones).

The product of its digits is 622080000, while the sum is 72.

The spelling of 899585856225 in words is "eight hundred ninety-nine billion, five hundred eighty-five million, eight hundred fifty-six thousand, two hundred twenty-five".